@article{MZM_2011_90_2_a7,
     author = {A. I. Kozhanov},
     title = {On the {Solvability} of {Certain} {Spatially} {Nonlocal} {Boundary-Value} {Problems} for {Linear} {Hyperbolic} {Equations} of {Second} {Order}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {254--268},
     publisher = {mathdoc},
     volume = {90},
     number = {2},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2011_90_2_a7/}
}