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What is a DOI?

A DOI (digital object identifier) is a unique number assigned to articles in electronic databases. It is a permanent identifying number, and so is a more reliable way to tell your reader where you found the article than a URL or a database name, which may change over time or be hidden behind a proxy server.

You can use a DOI resolver to track down known articles for which you have a DOI number. Just copy and paste the DOI to be directed to the article.