@article {2002, title = {Chaotic dynamics for perturbations of infinite-dimensional Hamiltonian systems}, journal = {Nonlinear Anal. 48 (2002) 481-504}, number = {SISSA;65/99/M}, year = {2002}, publisher = {Elsevier}, doi = {10.1016/S0362-546X(00)00200-5}, url = {http://hdl.handle.net/1963/1279}, author = {Massimiliano Berti and Carlo Carminati} }