# Zotero Connector PubMed Google Scholar workflow ## Quick Answer - Use Zotero Connector to capture PubMed records directly into your Zotero library, then switch to Google Scholar for items PubMed does not index. - Save full-text PDFs at the same time you save the citation so your screening library contains both metadata and source documents. - Google Scholar pagination limits how many results you can view, so run focused searches and capture records in batches instead of attempting one large export. ## Why Systematic Reviewers Need a Reliable Capture Workflow Systematic reviews depend on complete and accurate reference capture. A missed citation can change a screening decision, and a poorly saved record can break your chain of evidence. The practical problem is that no single database contains every relevant study. PubMed covers biomedical literature with strong indexing, while Google Scholar reaches gray literature, preprints, and sources that may not appear in PubMed at all. A workflow that uses both, with Zotero as the central library, gives you a defensible path from search to screening. The National Library of Medicine provides access to authoritative biomedical books and research-method references through its Bookshelf platform, which can help you align your search strategy with established review methods. The EQUATOR Network offers reporting guidelines that help you document your search and screening process transparently. When you build a reference capture workflow, you are beyond collecting files. You are creating an auditable record that supports the integrity of your review. This article walks through a practical method for using Zotero Connector with PubMed and Google Scholar. You will learn how to set up your library, capture records from each database, handle pagination, save full-text PDFs, and organize the results for screening. The workflow assumes you have Zotero installed and the Connector browser extension added to your browser. ## At a Glance | Step | Action | Result | | --- | --- | --- | | 1 | Install Zotero desktop and the Connector extension | A local library that accepts records from any browser | | 2 | Search PubMed and save records with the Connector | Structured metadata with MeSH terms and DOI when available | | 3 | Search Google Scholar and save records in batches | Records from sources PubMed does not index | | 4 | Attach full-text PDFs during capture | A screening library with both metadata and source files | | 5 | Deduplicate and organize into collections | A clean library ready for title and abstract screening | ## Setting Up Zotero for Database Capture ### Install Zotero Desktop and the Connector Extension Zotero runs as a desktop application that stores your library locally. The Connector is a browser extension that detects citations on web pages and saves them into your desktop library. You need both pieces for this workflow to function. Install Zotero desktop first, then add the Connector to your preferred browser. After installation, open Zotero desktop and confirm that the Connector icon appears in your browser toolbar. The icon changes depending on the page you are viewing. On a PubMed search results page, the icon shows a folder or document symbol that indicates the connector recognizes the page as a source of citations. ### Configure Your Library Structure Create a dedicated collection for each review project. A collection is a folder within Zotero that holds references without duplicating them in your main library. For a systematic review, use one collection for the search results and separate subcollections for included and excluded studies after screening. Set your preferences so that the Connector saves PDFs automatically when they are available. In Zotero desktop, open the preferences panel and look for the search and retrieval options. The exact wording varies by version, but the goal is to enable automatic PDF attachment when the connector finds a full-text file on the page. ## Capturing References from PubMed ### Save a Single Record Open PubMed and run your search. When you find a record you want to save, click the Connector icon in your browser toolbar. Zotero creates a new item with the bibliographic metadata from the PubMed record. The saved item includes the journal name, article title, authors, publication date, volume, issue, pages, DOI, and PMID when PubMed provides them. The Connector saves the record into the collection you selected in the popup window. If you have not selected a collection, the record goes to your main library. For a systematic review, always select the review collection so that your search results stay separate from your other reading. ### Save Multiple Records from a Search Results Page PubMed search results pages show a list of records. The Connector can save multiple records at once. Click the Connector icon while viewing the search results page, and Zotero shows a list of the records on the page. Select the records you want and confirm the save. This batch capture works best when your search results are within a single page. PubMed displays about 10 records per page by default. You can change the display to show more records per page, but the Connector only captures what is visible on the current page. For a large search, you need to move through the pages and capture each one. ### Handle PubMed Pagination PubMed does not let you export an entire search in one click through the Connector. The Connector reads the page you are viewing, so you must capture each page of results separately. This is a practical limitation, not a flaw in the tool. Plan your capture session so that you move through the results pages systematically and save each page before moving on. A common failure pattern is to capture the first page, then run a new search, and later realize you missed records from the middle pages. To avoid this, keep a simple log of your capture session. Write down the search string, the date, and the page numbers you captured. This log becomes part of your review record. ## Capturing References from Google Scholar ### Save a Single Record from Google Scholar Google Scholar presents each result with a title, authors, source, and a set of links. The Connector recognizes these records and saves them into Zotero. Click the Connector icon on a Google Scholar results page, and Zotero shows the records it detected. Select the record you want and confirm the save. Google Scholar records often include less structured metadata than PubMed records. The Connector captures what is visible on the page. If the page does not show a DOI, the record may not include one. You can add the DOI manually after the save, or you can use the Zotero metadata retrieval feature to update the record later. ### Save Multiple Records from Google Scholar Google Scholar shows about 10 results per page. The Connector can save all visible records from a page in one action. Click the Connector icon, select the records, and confirm the save. Google Scholar does not offer a bulk export feature that works with the Connector. You cannot select all results from a search and save them in one action. You must capture each page of results. This is the same limitation as PubMed, but Google Scholar adds another constraint. ### Handle Google Scholar Pagination Limits Google Scholar limits how many pages of results you can view for a single search. After a certain number of pages, Google Scholar stops showing additional results. This means you cannot capture an entire large search in one pass. You must break your search into smaller, more specific queries so that each query returns a manageable number of results. For a systematic review, this is a practical reason to run multiple targeted searches instead of one broad search. Each targeted search returns fewer results, and you can capture all of them within the pagination limit. Record each search string and the number of results you captured so that your search history is complete. ## Saving Full-Text PDFs During Capture ### Attach PDFs from PubMed PubMed records often include a link to the full text on the publisher site or in PubMed Central. When you save a record from PubMed, the Connector checks for a full-text PDF. If it finds one, it attaches the PDF to the item in Zotero. This automatic attachment works when the PDF is freely available. If the article is behind a paywall, the Connector cannot save the PDF. You can still save the bibliographic record, and you can add the PDF later if you obtain access through your institution. ### Attach PDFs from Google Scholar Google Scholar links to full-text PDFs when they are available. The Connector can save these PDFs along with the bibliographic record. The behavior depends on the source page. If the PDF is directly linked, the Connector saves it. If the PDF is on a publisher page that requires a click, the Connector may not follow the link. A practical approach is to save the record first, then open the article page and use the Connector again to save the PDF. Zotero attaches the PDF to the existing record when the metadata matches. This two-step process gives you more control over which PDFs you save. ### Organize PDFs in Your Library Each item in Zotero can hold multiple attachments. The bibliographic record is the parent item, and the PDF is a child attachment. When you open the item in Zotero, you see the metadata and the attached PDFs in the same panel. For screening, you want the PDF attached to the record so that you can open the full text without leaving Zotero. This keeps your screening workflow in one place. If you cannot attach a PDF, note that in your screening log so that you know the full text is missing. ## Organizing Your Library for Screening ### Use Collections for Each Review Stage Create a collection for each stage of your review. A common structure is one collection for all search results, one for records that pass title and abstract screening, and one for records that pass full-text screening. You can move records between collections without deleting them from your library. This structure gives you a clear view of your progress. You can see how many records you started with, how many you excluded, and how many you included. The numbers become part of your review record. ### Use Tags for Screening Decisions Tags are a flexible way to mark records without moving them between collections. You can add a tag for excluded, included, unclear, or needs full text. Tags are searchable, so you can filter your library by tag to see all records with a specific status. A practical tagging system uses a small set of consistent tags. For example, use excluded, included, and unclear. Do not create a new tag for every reason. Instead, use a separate note field to record the reason for exclusion. This keeps your tags clean and your notes detailed. ### Use Notes for Screening Details Zotero items can hold notes. Use the note field to record why you excluded a record or what you need to check. This is especially useful during full-text screening, where you may need to record a specific reason for exclusion. Notes are attached to the item and stay with the record. When you export your library for a review report, the notes are available as part of the record. This gives you a complete audit trail for each decision. ## Handling Duplicate Records ### Identify Duplicates When you capture records from both PubMed and Google Scholar, you will see the same article appear twice. Zotero has a duplicate detection feature that finds items with matching titles, DOIs, or other identifiers. Run the duplicate check after you finish capturing records from both databases. The duplicate check is not automatic. You need to run it manually. In Zotero desktop, open the collection and select the duplicate check option. Zotero shows you groups of items that may be duplicates. ### Merge Duplicate Records When Zotero identifies a duplicate group, you can merge the items into one. The merge keeps the metadata from the item you choose and combines the attachments. This is important for your review because a duplicate record can be counted twice during screening. Merge duplicates before you start screening. If you screen a record twice, you may make two different decisions about the same study. Merging first prevents this error. ### Prevent Duplicates During Capture You can reduce duplicates by capturing from one database first, then the other. For example, capture all PubMed records, then capture Google Scholar records. When you capture the Google Scholar records, you can check whether the record already exists in your library before you save it. The Connector does not automatically check for duplicates before saving. You need to do this manually. This is a practical step that saves time later. ## Common Failure Patterns ### Missing Metadata from Google Scholar Google Scholar pages do not always include complete bibliographic metadata. The Connector saves what it can read from the page. If the page does not show a DOI, the record will not have one. If the page does not show the volume and issue, the record will not have them. You can fix this after capture. Select the record in Zotero and use the metadata retrieval feature. Zotero looks up the record by DOI or title and updates the metadata. This works when the DOI is available or when the title is unique. ### PDFs Not Attached The Connector cannot save a PDF when the full text is behind a paywall or when the source page does not provide a direct PDF link. This is a common limitation. You can still save the bibliographic record, and you can add the PDF later if you have access. For a systematic review, you need the full text for the full-text screening stage. If you cannot access the full text, you may need to request it through interlibrary loan or contact the author. This is a practical limitation that affects the completeness of your review. ### Pagination Limits Both PubMed and Google Scholar limit how many records you can capture in one session. PubMed shows a limited number of records per page, and Google Scholar limits the total number of pages you can view. You must capture records in batches and keep a log of your progress. This is not a failure of the tool. It is a design constraint of the databases. A systematic review search strategy should account for this by using multiple targeted searches instead of one broad search. ## Records and Measurements ### Keep a Capture Log A capture log is a simple table or spreadsheet that records each capture session. Include the date, the database, the search string, the number of records captured, and the page range. This log is part of your review record and helps you verify that you captured all results. The log does not need to be complex. A spreadsheet with columns for date, database, search, and count is enough. Keep the log in the same folder as your review files so that it is easy to find. ### Verify Your Library Count After you capture records from both databases and merge duplicates, count the records in your review collection. This number is your starting point for screening. Compare it to the total number of records you captured from each database to confirm that the merge worked correctly. If the count does not match your log, check for records that were not captured or duplicates that were not merged. This verification step catches errors before you start screening. ## Quality and Welfare Context ### Research Integrity and Publication Ethics The Committee on Publication Ethics (COPE) Core Practices cover authorship, peer review, data, conflicts of interest, and misconduct. A systematic review is a research project, and the same ethical standards apply. Your capture workflow is part of your data handling. You need to record your search and capture process so that your review is transparent and reproducible. The EQUATOR Network provides reporting guidelines that help you document your review methods. Following a reporting guideline ensures that your review report includes the details readers need to assess your methods. This includes the databases you searched, the dates you searched, and the number of records you captured. ### Researcher Identity and ORCID ORCID provides a persistent identifier for researchers. Using an ORCID in your review report helps readers identify you and your work. The ORCID for Researchers page explains how to maintain your record and connect it to your publications. This is relevant when you publish your review and want your work to be correctly attributed. ### Data Management and Sharing The NIH Data Management and Sharing Policy describes expectations for managing and sharing research data. A systematic review produces data in the form of search records, screening decisions, and extracted data. Planning how you will manage and share this data is part of a responsible review process. The policy page provides context for these expectations. ## Professional Escalation Criteria ### When to Seek Help If you cannot capture records from a database, or if your library has a large number of records with missing metadata, you may need help. A librarian with expertise in systematic reviews can help you refine your search strategy and troubleshoot capture issues. This is a professional escalation step that is appropriate when the workflow is not working as expected. ### When to Consult Institutional Policy Your institution may have specific requirements for systematic review methods or data management. Check with your library or research office before you start a review. If your review is part of a funded project, your funder may have specific requirements for data sharing. The NIH Grants and Funding page provides context for grant-related expectations. ## Frequently Asked Questions ### Does the Zotero Connector work with both PubMed and Google Scholar? Yes. The Connector recognizes citation pages on both databases. On PubMed, it saves structured bibliographic records. On Google Scholar, it saves the records it can read from the page. The metadata quality may differ between the two databases. ### Can I save multiple records at once from PubMed? Yes. The Connector can save multiple records from a PubMed search results page. It captures the records visible on the current page. You need to move through the pages to capture all results. ### Can I save multiple records at once from Google Scholar? Yes. The Connector can save multiple records from a Google Scholar results page. It captures the records visible on the current page. Google Scholar limits the total number of pages you can view, so you may need to run multiple searches. ### How do I save a full-text PDF with a record? The Connector saves a PDF when it can find a direct link to the full text. If the PDF is behind a paywall or requires a click, the Connector may not save it. You can save the record first, then open the article page and use the Connector again to attach the PDF. ### How do I handle duplicate records from PubMed and Google Scholar? Use the Zotero duplicate detection feature to find duplicates, then merge them. Merging keeps the metadata and attachments from the items you choose. Run the duplicate check after you capture records from both databases. ### What should I do if a record is missing metadata? Use the Zotero metadata retrieval feature to update the record. Zotero looks up the record by DOI or title and fills in the missing fields. This works when the DOI is available or the title is identifiable. ### How do I organize my library for screening? Create a collection for each review stage. Use one collection for search results, one for records after title and abstract screening, and one for records after full-text screening. Use tags for screening decisions and notes for details. ### What should I record in my capture log? Record the date, database, search string, and number of records captured for each session. This log is part of your review record and helps you verify that you captured all results. ## Using the Evidence | Source | Best use in this topic | Important limitation | |---|---|---| | [Research Methods Resources](https://www.ncbi.nlm.nih.gov/books) | official guidance | Check the linked page for current local requirements | | [EQUATOR Network](https://www.equator-network.org/) | official guidance | Check the linked page for current local requirements | | [Core Practices](https://publicationethics.org/core-practices) | official guidance | Check the linked page for current local requirements | ## Related Articles - [Meta-Analysis vs Systematic Review: Choosing the Right Synthesis Method](/blog/guides/meta-analysis-vs-systematic-review-choosing-the-right-synthesis-method) - [Umbrella Reviews: Synthesizing Evidence from Multiple Meta-Analyses](/blog/guides/umbrella-reviews-synthesizing-evidence-from-multiple-meta-analyses) - [16s Denoising Workflow](/blog/guides/16s-denoising-workflow) - [Pacbio Sequencing Workflow](/blog/guides/pacbio-sequencing-workflow) - [Multiple Genome Alignment](/blog/guides/multiple-genome-alignment) ## References and Further Reading - [Research Methods Resources](https://www.ncbi.nlm.nih.gov/books). National Library of Medicine. - [EQUATOR Network](https://www.equator-network.org/). EQUATOR Network. - [Core Practices](https://publicationethics.org/core-practices). Committee on Publication Ethics. - [NIH Grants and Funding](https://grants.nih.gov/). National Institutes of Health. - [ORCID for Researchers](https://info.orcid.org/researchers). ORCID. - [Data Management and Sharing Policy](https://sharing.nih.gov/data-management-and-sharing-policy). National Institutes of Health. - [NCBI Literature Resources](https://www.ncbi.nlm.nih.gov/). National Center for Biotechnology Information. - [PubMed](https://pubmed.ncbi.nlm.nih.gov/). National Library of Medicine. > This article is educational and does not replace institutional policy, professional advice, or applicable safety and regulatory requirements.