Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1969_5_5_a10, author = {M. S. Nikol'skii}, title = {A certain problem with a small parameter}, journal = {Differencialʹnye uravneni\^a}, pages = {890--897}, publisher = {mathdoc}, volume = {5}, number = {5}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1969_5_5_a10/} }
M. S. Nikol'skii. A certain problem with a small parameter. Differencialʹnye uravneniâ, Tome 5 (1969) no. 5, pp. 890-897. http://geodesic.mathdoc.fr/item/DE_1969_5_5_a10/