Answered By: Reference Staff
Last Updated: Apr 20, 2017     Views: 129

A DOI or digital object identifier is  a unique alphanumeric string assigned by a registration agency to identify content and provide a persistent link to the location on the Internet. The publisher assigns a DOI when an article is published and made available electronically. 
  • CrossRef is a free DOI lookup tool that allows you to look up an article's DOI:. You can often find DOI's in article databases. View the full citation to see if a DOI is included.
  • Remember that DOI numbers are assigned to academic, scholarly journal articles (not popular magazine or newspaper articles).
  • If an article has a DOI (not all do), it will usually be printed at the top of the article in the header or at the bottom of the first page. 

For example, on this article the DOI is at the bottom right of the first page:

**It's also in the quick view of the article after the ISSN number.

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