@article{DE_1989_25_2_a14,
     author = {V. G. Romanov},
     title = {Local solvability of some multidimensional inverse problems for equations of hyperbolic type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {275--283},
     publisher = {mathdoc},
     volume = {25},
     number = {2},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_2_a14/}
}