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@article{DE_1990_26_2_a11, author = {V. F. Butuzov and A. G. Nikitin}, title = {A singularly perturbed system of equations of elliptic type}, journal = {Differencialʹnye uravneni\^a}, pages = {271--278}, publisher = {mathdoc}, volume = {26}, number = {2}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1990_26_2_a11/} }
V. F. Butuzov; A. G. Nikitin. A singularly perturbed system of equations of elliptic type. Differencialʹnye uravneniâ, Tome 26 (1990) no. 2, pp. 271-278. http://geodesic.mathdoc.fr/item/DE_1990_26_2_a11/