@article{1104160996,
author = {Angenent, S. B.},
title = {The periodic orbits of an area preserving twist map},
journal = {Comm. Math. Phys.},
volume = {113},
number = {4},
year = {1988},
pages = { 353-374},
language = {en},
url = {http://dml.mathdoc.fr/item/1104160996}
}
Angenent, S. B. The periodic orbits of an area preserving twist map. Comm. Math. Phys., Tome 113 (1988) no. 4, pp. 353-374. http://gdmltest.u-ga.fr/item/1104160996/