@article{ZVMMF_1988_28_11_a1,
     author = {A. V. Baev},
     title = {On the solution of the inverse boundary value problem for the wave equation with a discontinuous coefficient},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1619--1633},
     publisher = {mathdoc},
     volume = {28},
     number = {11},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1988_28_11_a1/}
}