@article{VMUMM_1988_4_a12,
     author = {S. V. Yushmanov},
     title = {A simple relationship between the diameter and the radius of a graph},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {58--60},
     year = {1988},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1988_4_a12/}
}