Kazuyoshi Furukawa Tomoyuki Uchida Kazuya Yamada Tetsuhiro Miyahara Takayoshi Shoudai Yasuaki Nakamura Extracting Characteristic Structures among Words in Semistructured Documents. 356-367 2002 conf/pakdd/2002 PAKDD http://link.springer.de/link/service/series/0558/bibs/2336/23360356.htm db/conf/pakdd/pakdd2002.html#FurukawaUYMSN02