@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/