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@article{DAN_1966_167_5_a10, author = {B. A. Shcherbakov}, title = {Recurrent solutions of differential equations}, journal = {Doklady Akademii Nauk}, pages = {1004--1007}, publisher = {mathdoc}, volume = {167}, number = {5}, year = {1966}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1966_167_5_a10/} }
B. A. Shcherbakov. Recurrent solutions of differential equations. Doklady Akademii Nauk, Tome 167 (1966) no. 5, pp. 1004-1007. http://geodesic.mathdoc.fr/item/DAN_1966_167_5_a10/