Segev Wasserkrug Avigdor Gal Opher Etzion Yulia Turchin Complex event processing over uncertain data. 253-264 2008 DEBS http://doi.acm.org/10.1145/1385989.1386022 conf/debs/2008 db/conf/debs/debs2008.html#WasserkrugGET08