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@article{DMGT_2007_27_3_a12, author = {Frydrych, W. and \.Zak, A.}, title = {Preface to proceedings}, journal = {Discussiones Mathematicae. Graph Theory}, pages = {559}, publisher = {mathdoc}, volume = {27}, number = {3}, year = {2007}, language = {en}, url = {http://geodesic.mathdoc.fr/item/DMGT_2007_27_3_a12/} }
Frydrych, W.; Żak, A. Preface to proceedings. Discussiones Mathematicae. Graph Theory, Tome 27 (2007) no. 3, p. 559. http://geodesic.mathdoc.fr/item/DMGT_2007_27_3_a12/