@misc{DM_1989_1_2_a15,
     title = {VIII {All-Union} conference on problems of theoretical cybernetics},
     journal = {Diskretnaya Matematika},
     pages = {159},
     year = {1989},
     volume = {1},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1989_1_2_a15/}
}