@article{DMGT_2009_29_3_a5,
     author = {Czap, J\'ulius and Jendrol', Stanislav},
     title = {Colouring vertices of plane graphs under restrictions given by faces},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {521--543},
     publisher = {mathdoc},
     volume = {29},
     number = {3},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2009_29_3_a5/}
}