%0 Journal Article %A S. P. Novikov %T Quantization of finite-gap potentials and nonlinear quasiclassical approximation in nonperturbative string theory %J Funkcionalʹnyj analiz i ego priloženiâ %D 1990 %P 43-53 %V 24 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1990_24_4_a4/ %G ru %F FAA_1990_24_4_a4