@article{ZNSL_1987_165_a3,
     author = {M. I. Belishev and Ya. V. Kurylev},
     title = {Nonstationary inverse problem for the multidimensional wave equation {\textquotedblleft}in the large{\textquotedblright}},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {21--30},
     year = {1987},
     volume = {165},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1987_165_a3/}
}