%0 Journal Article %A V. P. Sadokov %T Approximate solutions of a non-linear equation for the velocity curl in the middle troposphere %J Doklady Akademii Nauk %D 1960 %P 578-581 %V 134 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1960_134_3_a18/ %G ru %F DAN_1960_134_3_a18