Ada Wai-Chee Fu Oscar Tat-Wing Leung Eamonn J. Keogh Jessica Lin Finding Time Series Discords Based on Haar Transform. 31-41 2006 conf/adma/2006 ADMA http://dx.doi.org/10.1007/11811305_3 db/conf/adma/adma2006.html#FuLKL06