Michael Fink Hans Tompits Stefan Woltran 20th Workshop on Logic Programming, Vienna, Austria, February 22--24, 2006 INFSYS Research Report 1843-06-02 WLP Technische Universität Wien, Austria 2006 db/conf/wlp/wlp2006.html http://www.kr.tuwien.ac.at/wlp06/proceedings.html