1. Consensus Techniques and the Comparison of Taxonomic Trees
2. Aldenderfer, M.S. (1977). A consumer report on cluster analysis software. (2) Hierarchical methods. Unpublished report
3. Computer-assisted Bacterial Systematics;Alderson,1985
4. Cluster Analysis for Applications.;Anderberg,1973
5. Evolutionary trees from nucleic acid and protein sequences