T. Eiter, W. Faber, G. Pfeifer, A. Polleres:
"Declarative Planning and Knowledge Representation in an Action Language";
in: "Intelligent Techniques for Planning", I. Vlahavas, D. Vrakas (ed.); Idea Group Publishing, 2005, ISBN: 1-59140-450-9, 1 - 34.
http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC05936486