@article{DAN_1983_270_6_a4,
     author = {A. S. Zapreev and V. A. Tsetsocho},
     title = {Determination of the right-hand side of the {Helmholtz} equation},
     journal = {Doklady Akademii Nauk},
     pages = {1305--1308},
     publisher = {mathdoc},
     volume = {270},
     number = {6},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1983_270_6_a4/}
}