@article{IVM_1999_12_a10,
     author = {V. A. Terletskii},
     title = {A~ariational maximum principle in controlled systems of one-dimensional hyperbolic equations},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {82--90},
     publisher = {mathdoc},
     number = {12},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1999_12_a10/}
}