%0 Journal Article
%1 small1973cocitation
%A Small, Henry
%D 1973
%I Wiley Subscription Services, Inc., A Wiley Company
%J Journal of the American Society for Information Science
%K 10th citation cocitation literature scientific
%N 4
%P 265--269
%T Co-citation in the scientific literature: A new measure of the relationship between two documents
%U http://dx.doi.org/10.1002/asi.4630240406
%V 24
%X A new form of document coupling called co-citation is defined as the frequency with which two documents are cited together. The co-citation frequency of two scientific papers can be determined by comparing lists of citing documents in the Science Citation Index and counting identical entries. Networks of co-cited papers can be generated for specific scientific specialties, and an example is drawn from the literature of particle physics. Co-citation patterns are found to differ significantly from bibliographic coupling patterns, but to agree generally with patterns of direct citation. Clusters of co-cited papers provide a new way to study the specialty structure of science. They may provide a new approach to indexing and to the creation of SDI profiles.