@BOOK{Mueller+91aa, title = {Proceedings of the 5th International Conference on Autonomous Agents (Agents 2001)}, publisher = {ACM Press}, year = {2001}, editor = {J.~P.~M{\"u}ller and S.~Sen and E.~Andre and C.~Frasson}, rgroup = {winf}, url = {http://www.csc.liv.ac.uk/~agents2001/} }