%0 Journal Article %A G. M. Zaslavsky %T On the change of the adiabatic invariant of an non-linear periodic wave %J Doklady Akademii Nauk %D 1970 %P 760-763 %V 192 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1970_192_4_a14/ %G ru %F DAN_1970_192_4_a14