Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1988_301_2_a2, author = {D. G. Vasil'ev and Yu. G. Safarov}, title = {Branching {Hamiltonian} billiards}, journal = {Doklady Akademii Nauk}, pages = {271--275}, publisher = {mathdoc}, volume = {301}, number = {2}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1988_301_2_a2/} }
D. G. Vasil'ev; Yu. G. Safarov. Branching Hamiltonian billiards. Doklady Akademii Nauk, Tome 301 (1988) no. 2, pp. 271-275. http://geodesic.mathdoc.fr/item/DAN_1988_301_2_a2/