Takahiro Hayashi Koji Abe Rikio Onai Retrieval of Personal Web Documents by Extracting Subjective Expressions. 1187-1192 2008 AINA Workshops http://doi.ieeecomputersociety.org/10.1109/WAINA.2008.52 conf/aina/2008w db/conf/aina/ainaw2008.html#HayashiAO08