@incollection{GuizzardiWagner2005, author = {Giancarlo Guizzardi and Gerd Wagner}, title = {Towards Ontological Foundations for Agent Modelling Concepts using the Unified Foundational Ontology (UFO)}, booktitle = {Agent oriented information systems, 6th international bi-conference workshop, revised selected papers, AOIS 2004, Riga, Latvia, June 8, 2004, Bd. 2}, editor = {Paolo Giorgini}, isbn = {3-540-25911-2}, year = {2005}, }