Serial Item and Contribution Identifier

The Serial Item and Contribution Identifier (SICI) is a code used to uniquely identify specific volumes or articles or other identifiable parts of a periodical. It is an extension of the International Standard Serial Number, which identifies a periodical, similar to the way an ISBN number identifies a specific book. The ISSN applies to the entire publication, including every volume, and a more specific identifier was created. It can be used as a URN to identify a specific article inside <cite> tags, for instance, and is used by JSTOR.