Rainer Stiefelhagen Keni Bernardin Rachel Bowers R. Travis Rose Martial Michel John S. Garofolo The CLEAR 2007 Evaluation. 3-34 2007 CLEAR http://dx.doi.org/10.1007/978-3-540-68585-2_1 conf/clear/2007 db/conf/clear/clear2007.html#StiefelhagenBBRMG07