@article{DE_1994_30_12_a13,
     author = {V. G. Prikazchikov and G. S. Medvedev},
     title = {An approximate method for solving a spectral problem in a nonconvex domain},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2153--2161},
     publisher = {mathdoc},
     volume = {30},
     number = {12},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1994_30_12_a13/}
}