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@article{DE_1971_7_4_a15, author = {V. I. Korzyuk}, title = {The problem of the conjugacy of certain nonstationary differential equations of order $2m$}, journal = {Differencialʹnye uravneni\^a}, pages = {750--753}, publisher = {mathdoc}, volume = {7}, number = {4}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1971_7_4_a15/} }
V. I. Korzyuk. The problem of the conjugacy of certain nonstationary differential equations of order $2m$. Differencialʹnye uravneniâ, Tome 7 (1971) no. 4, pp. 750-753. http://geodesic.mathdoc.fr/item/DE_1971_7_4_a15/