@article{VSGU_2017_3_a3,
     author = {V. A. Kirichek},
     title = {Problem with nonlocal boundary condition for a hyperbolic equation},
     journal = {Vestnik Samarskogo universiteta. Estestvennonau\v{c}na\^a seri\^a},
     pages = {26--33},
     publisher = {mathdoc},
     number = {3},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGU_2017_3_a3/}
}