@article{DE_1976_12_8_a12,
     author = {L. A. Ivanov},
     title = {Diffraction problems with a noncylindrical boundary of discontinuity},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1485--1494},
     publisher = {mathdoc},
     volume = {12},
     number = {8},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_8_a12/}
}