%0 Journal Article %A W. I. Fushchych %A I. A. Egorchenko %T Symmetric properties of complex-valued nonlinear wave equations %J Doklady Akademii Nauk %D 1988 %P 347-351 %V 298 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1988_298_2_a19/ %G ru %F DAN_1988_298_2_a19