@article{PDM_2011_13_a8,
     author = {V. N. Potapov},
     title = {On perfect 2-colorings of the $q$-ary hypercube},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {18--20},
     year = {2011},
     number = {13},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2011_13_a8/}
}