1. Cluster analysis;Aldenderfer,1984
2. Mapping science by combined co-citation and word analysis 1: Structural aspects;Braam;Journal of the American Society for Information Science,1991
3. Cluster analysis;Everitt,2001
4. Document in action;Fano,1956
5. Co-citation bibliometric modeling as a tool for S&T and R&D management: Issues, applications, and developments;Franklin,1988