[1] Like bibliographic coupling, co-citation is a semantic similarity measure for documents that makes use of citation analyses.
Documents co-cited at greater relative distances in the full text receive lower CPI values.
[6] Co-citation analysis provides a forward-looking assessment on document similarity in contrast to Bibliographic Coupling, which is retrospective.
[7] The citations a paper receives in the future depend on the evolution of an academic field, thus co-citation frequencies can still change.
[9] The motivations of authors for citing literature can vary greatly and occur for a variety of reasons aside from simply referring to academically relevant documents.