Heiner Stuckenschmidt Frank van Harmelen Anita de Waard Tony Scerri Ravinder Bhogal Jan van Buel Ian Crowlesmith Christiaan Fluit Arjohn Kampman Jeen Broekstra Erik M. van Mulligen 34-40 2004 19 IEEE Intelligent Systems 3 http://doi.ieeecomputersociety.org/10.1109/MIS.2004.9 db/journals/expert/expert19.html#StuckenschmidtHWSBBCFKBM04