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@article{DE_1990_26_10_a6, author = {V. I. Kachalov}, title = {Smoothness of solutions of differential equations that contain a parameter}, journal = {Differencialʹnye uravneni\^a}, pages = {1711--1716}, publisher = {mathdoc}, volume = {26}, number = {10}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1990_26_10_a6/} }
V. I. Kachalov. Smoothness of solutions of differential equations that contain a parameter. Differencialʹnye uravneniâ, Tome 26 (1990) no. 10, pp. 1711-1716. http://geodesic.mathdoc.fr/item/DE_1990_26_10_a6/