Digital Object Identifiers (DOIs) can be used to cite and link to electronic articles. A DOI is guaranteed to never change, so can be used as a persistent identifier to permanently link to an electronic article no matter where it is stored. An example of a citation using a DOI is the following:
When you see a DOI reference to an article online, you can usually just click on the DOI to access the article (provided that - if applicable - you have the required access rights to the platform where the article is located).
In cases where you see a DOI in a printed document or if the online DOI is not clickable for some reason, it is possible to access the article as follows: