Authors: Bessi, U Chierchia, L Valdinoci, E

Citation: U. Bessi et al., Upper bounds on Arnold diffusion times via Mather theory, J MATH P A, 80(1), 2001, pp. 105-129

Authors: Bessi, U

Citation: U. Bessi, An analytic counterexample to the KAM theorem, ERGOD TH DY, 20, 2000, pp. 317-333

Authors: Bessi, U Semijopuva, V

Citation: U. Bessi et V. Semijopuva, Minimal orbits close to periodic frequencies, COMM MATH H, 73(4), 1998, pp. 516-547