Guanghao Li Tadashi Ohmori Mamoru Hoshi Yoshinobu Yamashita A New Sequence Pattern Search Algorithm N-OPS. 1241 2005 ICDE Workshops http://doi.ieeecomputersociety.org/10.1109/ICDE.2005.165 db/conf/icde/icdew2005.html#LiOHY05