%0 Journal Article %A A. V. Tulub %T A new derivation of nonlinear optics formulas %J Doklady Akademii Nauk %D 1973 %P 584-587 %V 212 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1973_212_3_a15/ %G ru %F DAN_1973_212_3_a15