Stefan Decker Rudi Studer Towards an Enterprise Reference Scheme for Building Knowledge Management Systems. 1998 conf/modellierung/1998 Modellierung http://SunSITE.Informatik.RWTH-Aachen.DE/Publications/CEUR-WS/Vol-9/Decker.ps db/conf/modellierung/modellierung1998.html#DeckerS98