@article{ZVMMF_1973_13_3_a6,
     author = {K. K. Gasanov},
     title = {The existence of optimal controls for processes that are described by a system of hyperbolic equations},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {599--608},
     publisher = {mathdoc},
     volume = {13},
     number = {3},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1973_13_3_a6/}
}