CrossRef
From Wikipedia, the free encyclopedia
CrossRef is an official Digital Object Identifier (or DOI) Registration Agency. It was launched in early 2000 as a cooperative effort among publishers to enable cross-publisher citation linking in online academic journals. To date, CrossRef is the most robust implementation of the DOI model. It now interlinks millions of items from a variety of content types, including journals, books, working papers, technical reports, and datasets. More information is available at the CrossRef website [1].

