Gopal Gupta Hai-Feng Guo Arthur I. Karshmer Enrico Pontelli Juan Raymundo Iglesias Desh Ranjan Brook Milligan Nayana Datta Omar El-Khatib Mohammed Noamany Xinhong Zhou Semantics-Based Filtering: Logic Programming's Killer App? 82-100 2002 conf/padl/2002 PADL http://link.springer.de/link/service/series/0558/bibs/2257/22570082.htm db/conf/padl/padl2002.html#GuptaGKPIRMDENZ02