Masato Hagiwara Yasuhiro Ogawa Katsuhiko Toyama PLSI Utilization for Automatic Thesaurus Construction. 334-345 2005 conf/ijcnlp/2005 IJCNLP http://dx.doi.org/10.1007/11562214_30 db/conf/ijcnlp/ijcnlp2005.html#HagiwaraOT05