@article{DA_1984_24_a7,
     author = {V. A. Srochko},
     title = {Necessary conditions for optimality for hyperbolic systems with distributed parameters under constraints on the state},
     journal = {Diskretnyj analiz i issledovanie operacij},
     pages = {85--93},
     year = {1984},
     number = {24},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DA_1984_24_a7/}
}