%0 Journal Article %A Paweł Żyliński %T Orthogonal art galleries with holes: a coloring proof of Aggarwal's theorem %J The electronic journal of combinatorics %D 2006 %V 13 %U http://geodesic.mathdoc.fr/articles/10.37236/1046/ %R 10.37236/1046 %F 10_37236_1046