@article{DAN_1968_181_3_a11,
     author = {V. G. Romanov},
     title = {A certain formulation of the inverse problem for a generalized wave equation},
     journal = {Doklady Akademii Nauk},
     pages = {554--557},
     publisher = {mathdoc},
     volume = {181},
     number = {3},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_181_3_a11/}
}