Thesaurus-based query and document expansion in conceptual indexing with UMLS: Application in medical information retrieval.

Diem Thi Hoang Le Jean-Pierre Chevallet Dong Thi Bich Thuy Thesaurus-based query and document expansion in conceptual indexing with UMLS: Application in medical information retrieval. 242-246 2007 RIVF http://dx.doi.org/10.1109/RIVF.2007.369163 conf/rivf/2007 db/conf/rivf/rivf2007.html#LeCT07