Julien Rabatel Sandra Bringay Pascal Poncelet SO_MAD: SensOr Mining for Anomaly Detection in Railway Data. 191-205 2009 ICDM http://dx.doi.org/10.1007/978-3-642-03067-3_16 conf/incdm/2009 db/conf/incdm/incdm2009.html#RabatelBP09