Masaharu Yoshioka Makoto Haraguchi An Appropriate Boolean Query Reformulation Interface for Information Retrieval Based on Adaptive Generalization. 145-150 2005 conf/wiri/2005 WIRI http://doi.ieeecomputersociety.org/10.1109/WIRI.2005.6 db/conf/wiri/wiri2005.html#YoshiokaH05