TY  - RPRT
TI  - SAPHIRE--an information retrieval system featuring concept matching, automatic indexing, probabilistic retrieval, and hierarchical relationships.
AU  - W R Hersh
AU  - R A Greenes
PY  - 1990
DO  - 10.1016/0010-4809(90)90031-7
UR  - https://pubmed.ncbi.nlm.nih.gov/2225787/
ID  - 2225787
ER  -