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@article{DE_1970_6_4_a10, author = {A. N. Erugin}, title = {A comparison of the solutions of two differential equations}, journal = {Differencialʹnye uravneni\^a}, pages = {687}, publisher = {mathdoc}, volume = {6}, number = {4}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1970_6_4_a10/} }
A. N. Erugin. A comparison of the solutions of two differential equations. Differencialʹnye uravneniâ, Tome 6 (1970) no. 4. http://geodesic.mathdoc.fr/item/DE_1970_6_4_a10/