@article{PDM_2018_3_a6,
     author = {P. V. Lebedev},
     title = {Structural properties of minimal primitive digraphs},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {66--75},
     publisher = {mathdoc},
     number = {3},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2018_3_a6/}
}