Reto Krummenacher Elena Paslaru Bontas Simperl Dieter Fensel Scalability in Semantic Computing: Semantic Middleware. 538-545 2008 ICSC http://doi.ieeecomputersociety.org/10.1109/ICSC.2008.39 conf/semco/2008 db/conf/semco/icsc2008.html#KrummenacherSF08