M. Atzmueller, J. Baumeister, and F. Puppe. INAP/WLP'04: Applications of Declarative Programming and Knowledge Management (selected papers), LNAI 3392, page 65-78. (2005)
M. Atzmueller, J. Baumeister, and F. Puppe. Proc. of the 19th International Florida Artificial Intelligence Research Society Conference (FLAIRS-2006), pp. 402-407, AAAI Press, USA, (2006)