@article{ZVMMF_1990_30_7_a3,
     author = {I. S. Litvinchev},
     title = {Decomposition in extremal problems with special structure},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1008--1016},
     publisher = {mathdoc},
     volume = {30},
     number = {7},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1990_30_7_a3/}
}