@article{ZVMMF_1990_30_1_a6,
     author = {A. B. Vasil'eva and A. V. Paveliev},
     title = {On the existence of solutions of the contrast structure type},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {72--86},
     publisher = {mathdoc},
     volume = {30},
     number = {1},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1990_30_1_a6/}
}