@inproceedings{DBLP:conf/wlp/Konczak06a, author = {Konczak, Kathrin}, title = {Weak Order Equivalence for Logic Programs with Preferences}, booktitle = {{WLP}}, series = {{INFSYS} Research Report}, volume = {1843-06-02}, pages = {154--163}, publisher = {Technische Universit{\"{a}}t Wien, Austria}, year = {2006} }