@article{10_37236_1046,
     author = {Pawe{\l} \.Zyli\'nski},
     title = {Orthogonal art galleries with holes: a coloring proof of {Aggarwal's} theorem},
     journal = {The electronic journal of combinatorics},
     year = {2006},
     volume = {13},
     doi = {10.37236/1046},
     zbl = {1087.05020},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1046/}
}