Hideo Bannai Heikki Hyyrö Ayumi Shinohara Masayuki Takeda Kenta Nakai Satoru Miyano Finding Optimal Pairs of Patterns. 450-462 http://dx.doi.org/10.1007/978-3-540-30219-3_38 2004 conf/wabi/2004 WABI db/conf/wabi/wabi2004.html#BannaiHSTNM04