Jiahong Wang Yoshiaki Asanuma Eiichiro Kodama Toyoo Takata A Scalable Sequential Pattern Mining Algorithm. 437-444 2006 AICCSA http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=33913&arnumber=1618393&count=182&index=68 conf/aiccsa/2006 db/conf/aiccsa/aiccsa2006.html#WangAKT06