%0 Journal Article %A O. È. Zubelevich %T On exponentially small effects in dynamical systems with a~small parameter %J Zapiski Nauchnykh Seminarov POMI %D 2003 %P 273-278 %V 300 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_2003_300_a28/ %G en %F ZNSL_2003_300_a28