@article{DM_1994_6_4_a2,
     author = {V. G. Nikonov},
     title = {Coverings of {Boolean} graphs},
     journal = {Diskretnaya Matematika},
     pages = {21--34},
     publisher = {mathdoc},
     volume = {6},
     number = {4},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1994_6_4_a2/}
}