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@article{FAA_1977_11_4_a1, author = {B. R. Vainberg}, title = {Quasiclassical approximation in stationary scattering problems}, journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a}, pages = {6--18}, publisher = {mathdoc}, volume = {11}, number = {4}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/FAA_1977_11_4_a1/} }
B. R. Vainberg. Quasiclassical approximation in stationary scattering problems. Funkcionalʹnyj analiz i ego priloženiâ, Tome 11 (1977) no. 4, pp. 6-18. http://geodesic.mathdoc.fr/item/FAA_1977_11_4_a1/