An, Yuan, Janssen, Jeannette, Milios, Evangelos E.,
Characterizing and Mining the Citation Graph of the Computer Science Literature, in:
Knowl. Inf. Syst.
6
(2004),
S. 664--678.
Small, Henry,
Co-citation in the scientific literature: A new measure of the relationship between two documents, in:
Journal of the American Society for Information Science
24
4
(1973),
S. 265--269.