Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1996_4_a6, author = {Yu. F. Korobeinik}, title = {On periodic solutions of the {Cauchy} problem. {II}}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {39--49}, publisher = {mathdoc}, number = {4}, year = {1996}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1996_4_a6/} }
Yu. F. Korobeinik. On periodic solutions of the Cauchy problem. II. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (1996), pp. 39-49. http://geodesic.mathdoc.fr/item/IVM_1996_4_a6/