@article{ZVMMF_1969_9_2_a7,
     author = {E. G. D'yakonov},
     title = {A problem in the theory of network envelopes and its difference analogue},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {350--361},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1969_9_2_a7/}
}