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@article{DE_1990_26_8_a22, author = {V. N. Bobochko}, title = {A singularly perturbed problem with a noninvertible limit operator}, journal = {Differencialʹnye uravneni\^a}, pages = {1453--1454}, publisher = {mathdoc}, volume = {26}, number = {8}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1990_26_8_a22/} }
V. N. Bobochko. A singularly perturbed problem with a noninvertible limit operator. Differencialʹnye uravneniâ, Tome 26 (1990) no. 8, pp. 1453-1454. http://geodesic.mathdoc.fr/item/DE_1990_26_8_a22/