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@article{DA_2005_12_1_a2, author = {S. A. Puzynina}, title = {Perfect colorings of vertices of the graph $G(Z^2)$ in three colors}, journal = {Diskretnyj analiz i issledovanie operacij}, pages = {37--54}, publisher = {mathdoc}, volume = {12}, number = {1}, year = {2005}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DA_2005_12_1_a2/} }
S. A. Puzynina. Perfect colorings of vertices of the graph $G(Z^2)$ in three colors. Diskretnyj analiz i issledovanie operacij, Tome 12 (2005) no. 1, pp. 37-54. http://geodesic.mathdoc.fr/item/DA_2005_12_1_a2/