Wenxing Peng Taro Terao Yoshihiro Masuda Naofumi Yoshida Jun Miyazaki Document History System and its Application to Abnormal Document Access Pattern Detection with a Probabilistic Model. 486-493 2008 AINA http://doi.ieeecomputersociety.org/10.1109/AINA.2008.112 conf/aina/2008 db/conf/aina/aina2008.html#PengTMYM08