%0 Journal Article %A W. Wei %T On the development of nonlinear operator theory %J Funkcionalʹnyj analiz i ego priloženiâ %D 2020 %P 63-68 %V 54 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_2020_54_1_a5/ %G en %F FAA_2020_54_1_a5