@article{PDM_2015_2_a8,
     author = {V. M. Fomichev},
     title = {Properties of minimal primitive digraphs},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {86--96},
     publisher = {mathdoc},
     number = {2},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2015_2_a8/}
}