@article{01907110,
title = {A KAM theorem for infinite-dimensional discrete systems.},
journal = {Mathematical Physics Electronic Journal [electronic only]},
volume = {9},
year = {2003},
zbl = {1014.37048},
language = {en},
url = {http://dml.mathdoc.fr/item/01907110}
}
Perfetti, Paolo. A KAM theorem for infinite-dimensional discrete systems.. Mathematical Physics Electronic Journal [electronic only], Tome 9 (2003) . http://gdmltest.u-ga.fr/item/01907110/