TY - JOUR AU - Giorgilli, Antonio TI - On the problem of stability for near to integrable Hamiltonian systems JO - Documenta mathematica PY - 1998 SP - 143 EP - 152 VL - ICM Berlin 1998, Vol. III PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DOCMA_1998__S9__a63/ LA - en ID - DOCMA_1998__S9__a63 ER -