@article{DA_2001_8_3_a0,
     author = {V. G. Vizing and B. Toft},
     title = {The coloring of the incidentors and vertices of an undirected multigraph},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {3--14},
     publisher = {mathdoc},
     volume = {8},
     number = {3},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_2001_8_3_a0/}
}