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@article{DMGT_2006_26_2_a15, author = {Kubesa, Michael and Froncek, Dalibor}, title = {Problem presented at the workshop in {Krynica} 2004}, journal = {Discussiones Mathematicae. Graph Theory}, pages = {351}, publisher = {mathdoc}, volume = {26}, number = {2}, year = {2006}, language = {en}, url = {http://geodesic.mathdoc.fr/item/DMGT_2006_26_2_a15/} }
Kubesa, Michael; Froncek, Dalibor. Problem presented at the workshop in Krynica 2004. Discussiones Mathematicae. Graph Theory, Tome 26 (2006) no. 2, p. 351. http://geodesic.mathdoc.fr/item/DMGT_2006_26_2_a15/