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Answered By: MaryAlice Wade Last Updated: Feb 20, 2018 Views: 7
If an article has a DOI--not all do--it is usually found with the other identifying information across the top or bottom of the first page of the electronic version (print sources do not have DOIs). It may also be provided in the article's entry in the results of your database search or by using the database's citation feature (see screenshots).
DOI stands for Digital Object Identifier. It is a string of numbers, or numbers and letters (such as 10.1371/journal.pone.0086479) that identify a particular article or other information source, and does not change like a link might. It can be formatted as a link by adding https://doi.org/ or http://dx.doi.org/ at the beginning. A DOI link or web search for a DOI will lead you to the source, though you may or may not have free access to the full article.