@article{TRSPY_1973_126_a5,
     author = {V. I. Chekhlov},
     title = {A mixed problem with a discontinuous boundary operator for a hyperbolic equation},
     journal = {Informatics and Automation},
     pages = {171--223},
     publisher = {mathdoc},
     volume = {126},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1973_126_a5/}
}