@article{VSGU_2020_26_2_a1,
     author = {V. A. Kirichek},
     title = {On smoothness of solution of one nonlocal problem for hyperbolic equation},
     journal = {Vestnik Samarskogo universiteta. Estestvennonau\v{c}na\^a seri\^a},
     pages = {15--22},
     publisher = {mathdoc},
     volume = {26},
     number = {2},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGU_2020_26_2_a1/}
}