%0 Journal Article %A V. V. Avilov %A S. P. Novikov %T Evolution of the Whitham zone in KdV theory %J Doklady Akademii Nauk %D 1987 %P 325-329 %V 294 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1987_294_2_a15/ %G ru %F DAN_1987_294_2_a15