TY  - RPRT
TI  - Optimal classification into groups: an approach for solving the taxonomy problem.
AU  - J Rubin
PY  - 1967
DO  - 10.1016/0022-5193(67)90046-x
UR  - https://pubmed.ncbi.nlm.nih.gov/6034157/
ID  - 6034157
ER  -