Monica Crubézy Mark A. Musen Enrico Motta Wenjin Lu Configuring Online Problem-Solving Resources with the Internet Reasoning Service. 34-42 2003 18 IEEE Intelligent Systems 2 http://csdl2.computer.org/dl/mags/ex/2003/02/x2034.pdf db/journals/expert/expert18.html#CrubezyMML03