Michail Vlachos Marios Hadjieleftheriou Dimitrios Gunopulos Eamonn J. Keogh Indexing multi-dimensional time-series with support for multiple distance measures. 216-225 2003 conf/kdd/2003 KDD http://doi.acm.org/10.1145/956750.956777 db/conf/kdd/kdd2003.html#VlachosHGK03