%0 Journal Article %A F. R. Sadykov %T $L_2$-stability of stationary systems with several nonlinearities %J Doklady Akademii Nauk %D 1987 %P 297-301 %V 294 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1987_294_2_a8/ %G ru %F DAN_1987_294_2_a8