Haggai Roitman Avigdor Gal Louiqa Raschid Satisfying Complex Data Needs using Pull-Based Online Monitoring of Volatile Data Sources. 1465-1467 2008 ICDE http://dx.doi.org/10.1109/ICDE.2008.4497591 conf/icde/2008 db/conf/icde/icde2008.html#RoitmanGR08