@article{1104161423,
author = {Albanese, C. and Fr\"ohlich, J.},
title = {Periodic solutions of some infinite-dimensional Hamiltonian systems associated with nonlinear partial differential equations. I},
journal = {Comm. Math. Phys.},
volume = {113},
number = {4},
year = {1988},
pages = { 475-502},
language = {en},
url = {http://dml.mathdoc.fr/item/1104161423}
}
Albanese, C.; Fröhlich, J. Periodic solutions of some infinite-dimensional Hamiltonian systems associated with nonlinear partial differential equations. I. Comm. Math. Phys., Tome 113 (1988) no. 4, pp. 475-502. http://gdmltest.u-ga.fr/item/1104161423/