@article{DE_1999_35_6_a8,
     author = {A. N. Vityuk},
     title = {On the set of solutions of a boundary value problem for a hyperbolic differential inclusion},
     journal = {Differencialʹnye uravneni\^a},
     pages = {780--783},
     publisher = {mathdoc},
     volume = {35},
     number = {6},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1999_35_6_a8/}
}