A DOI (Digital Object Identifier) is a unique identifier used to ensure permanent access to the digital version of a paper or data via citations. Even if the location of the paper on the internet changes (resulting in broken URLs), readers will still be able to find it by using the DOI.
How to use DOIs
There are three ways to find a paper with a DOI:
If a paper has a DOI, please always add this to the end of your reference, and make it a link if you can. This will add value to your paper by helping readers access the reference in future. For example: