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@article{DE_1979_15_4_a16, author = {A. F. Shestopal}, title = {A spectral problem for the {Laplace} operator in domains of mirror-symmetric polyhedra}, journal = {Differencialʹnye uravneni\^a}, pages = {725--731}, publisher = {mathdoc}, volume = {15}, number = {4}, year = {1979}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1979_15_4_a16/} }
A. F. Shestopal. A spectral problem for the Laplace operator in domains of mirror-symmetric polyhedra. Differencialʹnye uravneniâ, Tome 15 (1979) no. 4, pp. 725-731. http://geodesic.mathdoc.fr/item/DE_1979_15_4_a16/