Library FAQ

A Digital Object Identifier (DOI) is a special number that identifies each unique article in a database.  They were made as an attempt to provide stable, long lasting links for online articles. They consist of a long alphanumerical code such as DOI: 10.1093/ajcn/nqz296. The DOI can frequently be found on the first page of an article or the article’s records or details page in the database.

Certain citation styles, such as APA and MLA, require that you utilize DOIs if they are available. Please note though that some articles may not have a DOI.

If you are having trouble finding the DOI, Ask a Librarian or check out the following tool:

• Crossref.org (tool to locate a doi number)