@BOOK{ AUTHOR = {Timo Steffens}, editor = {K\"uhnberger, K.-U. and K\"onig, P. and Ludewig, P.}, TITLE = {Feature-Based Declarative Opponent-Modelling in Multi-Agent Systems}, PUBLISHER = {Institute of Cognitive Science}, YEAR = {2004}, volume = {4-2004}, series = {Publications of the Institute of Cognitive Science}, address = {Osnabr\"uck}, isbn = {1610-5389}, }