Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1968_10_a1, author = {YU. P. Bychkov}, title = {Some aspects of analytical dynamics in grouped variables}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {13--16}, publisher = {mathdoc}, number = {10}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1968_10_a1/} }
YU. P. Bychkov. Some aspects of analytical dynamics in grouped variables. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 10 (1968), pp. 13-16. http://geodesic.mathdoc.fr/item/IVM_1968_10_a1/