Ivan Ivanov Frédéric Dufaux Thien M. Ha Touradj Ebrahimi Towards Generic Detection of Unusual Events in Video Surveillance. 61-66 2009 AVSS http://dx.doi.org/10.1109/AVSS.2009.63 conf/avss/2009 db/conf/avss/avss2009.html#IvanovDHE09