Finding a DOI

A DOI (digital object identifier) is a string of numbers and letters assigned to an electronic publication. It serves as a permanent link to the source.

Find it


It is found near the publication information at the top of an article or on the full item record in a database.

Screenshot of a journal article's publication information. The DOI information is enclosed in a red rectangle to indicate its location in the article's publication information.

Search it


With just the DOI number, you can search for an article on Library Search or another search engine. This is especially helpful if you find a source in another publication’s reference list and want to access it.

Screenshot of DOI search via Library Search
Screenshot of a search for an article using the DOI. The DOI appears in the search box and is enclosed in a red rectangle. The successful search result is located underneath the search box.

If the article does not come up in Library Search, try searching the number on doi.org.

Cite it


When citing an electronic article, use the DOI (when available) in place of the URL to document the location of the source or as required by the particular citation style you are using

Otranto, Domenico, et al. “The Enigma of the Dog Mummy from Ancient Egypt and the Origin of ‘Rhipicephalus sanguineus.’” Parasites & Vectors, vol. 7, no. 2, 20 Jan. 2014. BioMed Central, doi: 10.1186/1756-3305-7-2.