@article{DM_1990_2_2_a1,
     author = {A. A. Markov and T. G. Smirnova},
     title = {On dictionary colorings and some perfect graphs},
     journal = {Diskretnaya Matematika},
     pages = {16--32},
     year = {1990},
     volume = {2},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1990_2_2_a1/}
}