Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1964_2_a19, author = {V. Kh. Kharasakhal}, title = {On quasi-periodic solutions of differential equations}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {152--164}, publisher = {mathdoc}, number = {2}, year = {1964}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1964_2_a19/} }
V. Kh. Kharasakhal. On quasi-periodic solutions of differential equations. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 2 (1964), pp. 152-164. http://geodesic.mathdoc.fr/item/IVM_1964_2_a19/