@article{DE_1983_19_6_a18,
     author = {M. V. Klibanov},
     title = {A two-dimensional inverse problem for an elliptic equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1072--1074},
     publisher = {mathdoc},
     volume = {19},
     number = {6},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_6_a18/}
}