@article{RM_1993_48_2_a7,
     author = {A. Ya. Belov and S. V. Okhitin},
     title = {On a~combinatorial problem},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {170},
     publisher = {mathdoc},
     volume = {48},
     number = {2},
     year = {1993},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1993_48_2_a7/}
}