Angelos Hliaoutakis Kalliopi Zervanou Euripides G. M. Petrakis Evangelos E. Milios Automatic document indexing in large medical collections. 1-8 2006 conf/hikm/2006 HIKM http://doi.acm.org/10.1145/1183568.1183570 db/conf/hikm/hikm2006.html#HliaoutakisZPM06