Shinichi Nagano Masumi Inaba Yumiko Mizoguchi Takayuki Iida Takahiro Kawamura Ontology-Based Topic Extraction Service from Weblogs. 468-475 2008 ICSC http://doi.ieeecomputersociety.org/10.1109/ICSC.2008.80 conf/semco/2008 db/conf/semco/icsc2008.html#NaganoIMIK08