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@article{DE_1965_1_1_a4, author = {A. F. Andreev}, title = {On a {Hartman-Wintner} problem}, journal = {Differencialʹnye uravneni\^a}, pages = {33--40}, publisher = {mathdoc}, volume = {1}, number = {1}, year = {1965}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1965_1_1_a4/} }
A. F. Andreev. On a Hartman-Wintner problem. Differencialʹnye uravneniâ, Tome 1 (1965) no. 1, pp. 33-40. http://geodesic.mathdoc.fr/item/DE_1965_1_1_a4/