What is Citation?
A citation is a reference to a published or unpublished source.
What is the purpose of citation?
What is Digital Object Identifier (DOI)?
A digital object identifier (DOI) is a unique alphanumeric string assigned by a registration agency (the International DOI Foundation) to identify content and provide a persistent link to its location on the Internet. The publisher assigns a DOI when your article is published and made available electronically.