%0 Journal Article %A A. V. Zhiber %T Systems of equations of $n$-waves and nonlinear Schrödinger equations from the group-theoretical point of view %J Teoretičeskaâ i matematičeskaâ fizika %D 1982 %P 405-413 %V 52 %N 3 %U http://geodesic.mathdoc.fr/item/TMF_1982_52_3_a6/ %G ru %F TMF_1982_52_3_a6