Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1969_184_3_a8, author = {N. V. Medvedev}, title = {Periodic solutions of differential equations in a {Banach} space}, journal = {Doklady Akademii Nauk}, pages = {542--545}, publisher = {mathdoc}, volume = {184}, number = {3}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1969_184_3_a8/} }
N. V. Medvedev. Periodic solutions of differential equations in a Banach space. Doklady Akademii Nauk, Tome 184 (1969) no. 3, pp. 542-545. http://geodesic.mathdoc.fr/item/DAN_1969_184_3_a8/