带通配符的多序列模式挖掘*
 马晓文1,胡学钢1**,谢飞1·2,郭丹1
 Mining sequential patterns across multiple sequences with gap constraints
 Ma Xiao-Wen1,Hu Xue-Gang1,Xie Fei1’2,Guo Dan1
南京大学学报(自然科学版) . 2013, (2): 266 -234 .