Cited-by gives our members full access to citations, helping them to build a picture of how research has been received by the community.

Scholars use citations to critique and build on existing research, acknowledging the contributions of others. Members can include references in their metadata deposits which Crossref uses to create links between works that cite each other. The number of citations each work receives is visible to anyone through our public APIs. Through our Cited-by service, members who deposit reference metadata can retrieve everything they need to display citations on their website.

Members who use this service are helping readers to:

  • easily navigate to related research,
  • see how the work has been received by the wider community,
  • explore how ideas evolve over time by highlighting connections between works.

Watch the introductory Cited-by animation in your language: français; español; português do Brasil; 简体中文; 日本語; 한국어; العربية; bahasa Indonesia; or in English below.


How Cited-by works

Cited-by begins with depositing references as part of the metadata records for your content. Learn more about depositing references.

How Cited-by works - text description below diagram

A member registers content for a work, the citing paper. This metadata deposit includes the reference list. Crossref automatically checks these references for matches to other registered content. If this is successful, a citation is created.

Crossref logs the citations and updates the citation counts for each work. You can retrieve citation counts through our public APIs. Members who deposit references can sign up for the Cited-by service to retrieve the full list of citing works (not just the count), and can display them on their website.

Note that citations from Crossref may differ from those provided by other services because we only look for links between Crossref-registered works and don’t share the same method to find matches.

Obligations and fees for Cited-by

  • Participation in Cited-by is optional, but encouraged
  • There is no charge for Cited-by
  • You must include references when you register content in order to be eligible for Cited-by
  • You only retrieve Cited-by metadata for your own content.

Best practice for Cited-by

Because citations can happen at any time, Cited-by links must be kept up-to-date. Members should either check regularly for new citations or (if performing XML queries) set the alert attribute to true. This means the search will be saved in the system and you’ll get an alert when there is a new match.

Cited-by infographic

Download the Cited-by factsheet, and explore factsheets for other Crossref services and in different languages.

How to access citation matches

Members who deposit references allow them to be retrieved by anyone using our public APIs. For example:

Also in the metadata is the number of citations a work has received, under the tag "is-referenced-by-count".

However, to retrieve the full list of citations for your own works, you need to use Cited-by. While anyone can use an API query to see the number of citations a work has received, through Cited-by the member who deposited the work can retrieve a list of citing DOIs. Details of the citing works can be displayed on your website alongside the article.

In addition, Cited-by users can receive callback notifications or emails informing them when one of their works has been cited.

Page owner: Martyn Rittman   |   Last updated 2021-February-09