@article{DE_1990_26_10_a15,
     author = {M. V. Klibanov},
     title = {On an inverse problem of diffraction},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1777--1783},
     year = {1990},
     volume = {26},
     number = {10},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_10_a15/}
}