TY  - JOUR
AU  - V. G. Gelfreich
AU  - V. F. Lazutkin
TI  - Splitting of separatrices: perturbation theory and exponential smallness
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 2001
SP  - 499
EP  - 558
VL  - 56
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_2001_56_3_a1/
LA  - en
ID  - RM_2001_56_3_a1
ER  -