Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1967_173_6_a2, author = {V. G. Vizing}, title = {On the number of edges in a graph with a given radius}, journal = {Doklady Akademii Nauk}, pages = {1245--1246}, publisher = {mathdoc}, volume = {173}, number = {6}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1967_173_6_a2/} }
V. G. Vizing. On the number of edges in a graph with a given radius. Doklady Akademii Nauk, Tome 173 (1967) no. 6, pp. 1245-1246. http://geodesic.mathdoc.fr/item/DAN_1967_173_6_a2/