@article{1183535306, author = {Ahmad, Shair}, title = {Periodically perturbed conservative systems}, journal = {Bull. Amer. Math. Soc.}, volume = {80}, number = {4}, year = {1974}, pages = { 122-123}, language = {en}, url = {http://dml.mathdoc.fr/item/1183535306} }
Ahmad, Shair. Periodically perturbed conservative systems. Bull. Amer. Math. Soc., Tome 80 (1974) no. 4, pp. 122-123. http://gdmltest.u-ga.fr/item/1183535306/