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@article{DE_1974_10_4_a19, author = {G. P. Boyko}, title = {The exterior generalized {Dirichlet} problem for the {Helmholtz} equation}, journal = {Differencialʹnye uravneni\^a}, pages = {747--750}, publisher = {mathdoc}, volume = {10}, number = {4}, year = {1974}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1974_10_4_a19/} }
G. P. Boyko. The exterior generalized Dirichlet problem for the Helmholtz equation. Differencialʹnye uravneniâ, Tome 10 (1974) no. 4, pp. 747-750. http://geodesic.mathdoc.fr/item/DE_1974_10_4_a19/