%0 Journal Article %A S. M. Churilov %A I. G. Shuhman %T A nonlinear perturbation theory for weakly supercritical stratified %J Doklady Akademii Nauk %D 1987 %P 1372-1378 %V 293 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1987_293_6_a20/ %G ru %F DAN_1987_293_6_a20