Yubao Liu Xiuwei Chen Fei Wang Jian Yin Efficient Detection of Discords for Time Series Stream. 629-634 2009 APWeb/WAIM http://dx.doi.org/10.1007/978-3-642-00672-2_62 conf/waim/2009 db/conf/waim/waim2009.html#LiuCWY09