@article{DMGT_2006_26_3_a8,
     author = {Idzik, Adam and Junosza-Szaniawski, Konstanty},
     title = {Combinatorial lemmas for polyhedrons {I}},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {439--338},
     publisher = {mathdoc},
     volume = {26},
     number = {3},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2006_26_3_a8/}
}