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@article{DE_1976_12_10_a1, author = {V. F. Butuzov and N. N. Nefedov}, title = {A problem in the theory of singular perturbations}, journal = {Differencialʹnye uravneni\^a}, pages = {1736--1747}, publisher = {mathdoc}, volume = {12}, number = {10}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1976_12_10_a1/} }
V. F. Butuzov; N. N. Nefedov. A problem in the theory of singular perturbations. Differencialʹnye uravneniâ, Tome 12 (1976) no. 10, pp. 1736-1747. http://geodesic.mathdoc.fr/item/DE_1976_12_10_a1/