@misc{DM_1990_2_3_a19,
     title = {V.~B.~Kudryavtsev, {A.~S.~Podkolzin,} {A.~A.~Bolotov
}},
     journal = {Diskretnaya Matematika},
     pages = {159},
     publisher = {mathdoc},
     volume = {2},
     number = {3},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1990_2_3_a19/}
}