How to extract and verify references from a PDF

Treat extraction as a first pass, not a bibliography check

Reference extraction creates a working list from the citations visible in the processed PDF pages. It is useful for sorting, reviewing and exporting, but the original paper remains the authority for author order, punctuation, publication details and linked identifiers.

Before you start, locate the bibliography or reference section in the PDF and note whether it continues over several pages. References in footnotes, figure captions or appendices can follow a different pattern and deserve a separate check.

Use source pages to resolve incomplete fields

Review the extracted title, authors, year, publication, DOI and URL against the cited source page. Wrapped lines, hyphenated words and small text can split a reference into incomplete fields even when most of it was recognised correctly.

Correct a field only when the source supports it. If the PDF does not contain a DOI or a URL, leave it unconfirmed rather than inventing one from a similar-looking record.

Review checklist

• Check author order
• Check title and year
• Verify DOI and URL character by character
• Keep the source page with corrections

Check duplicates and citation variants

The same work can appear more than once with abbreviated author names, an erratum, a preprint and a published version. Do not merge records solely because their titles look similar; compare the year, publication and identifier first.

If the document includes a shortened reference list and full endnotes, keep both until you know which one the final task requires. The context of each citation can matter as much as its bibliographic fields.

Export only after the review is complete

Use the reviewable list to make a CSV or Word report for a librarian, researcher or project record. Preserve the source-page information when sharing exceptions so corrections can be checked quickly later.

An extracted list is not proof that the cited work exists, is current or supports the paper's argument. Confirm those questions through the appropriate authoritative catalogue, publisher or source before making a research claim.