%0 Journal Article %A V. A. Il'in %A K. V. Mal'kov %A E. I. Moiseev %T The basis property of systems of root functions of nonselfadjoint operators, and integrability of nonlinear evolution equations that are associated with the Lax representation. II %J Differencialʹnye uravneniâ %D 1989 %P 2133-2143 %V 25 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1989_25_12_a13/ %G ru %F DE_1989_25_12_a13