@article{DAN_1966_170_4_a4,
     author = {M. K. Gol'dberg},
     title = {On the diameter of a strongly connected graph},
     journal = {Doklady Akademii Nauk},
     pages = {767--769},
     publisher = {mathdoc},
     volume = {170},
     number = {4},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_170_4_a4/}
}