What are volume, issue number and DOI?

Volume and issue number refer to the specific edition of a printed or online publication. The volume number indicates the overall number of the publication, while the issue number distinguishes it from other editions within the same volume.

DOI, short for Digital Object Identifier, is a unique alphanumeric string assigned to a specific publication to provide a persistent link to its location on the internet. This helps ensure that the publication can be easily located and cited by researchers and other readers.