@article{DE_1988_24_4_a9,
     author = {A. A. Goncharenko and V. F. Kravchenko and V. I. Ponomarev},
     title = {On an inverse problem of the theory of the propagation of electromagnetic waves},
     journal = {Differencialʹnye uravneni\^a},
     pages = {622--627},
     publisher = {mathdoc},
     volume = {24},
     number = {4},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_4_a9/}
}