@article{DBLP:journals/fuin/KonczakSL03,
author = {Konczak, Kathrin and Schaub, Torsten and Linke, Thomas},
title = {Graphs and Colorings for Answer Set Programming with Preferences},
journal = {Fundam. Inform.},
volume = {57},
number = {2-4},
pages = {393--421},
year = {2003}
}