%0 Journal Article %A A. V. Turbiner %T Spectral Riemann surfaces of the Sturm--Liouville operator and quasiexactly solvable problems %J Funkcionalʹnyj analiz i ego priloženiâ %D 1988 %P 92-94 %V 22 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1988_22_2_a22/ %G ru %F FAA_1988_22_2_a22