TY - JOUR AU - A. V. Turbiner TI - Spectral Riemann surfaces of the Sturm--Liouville operator and quasiexactly solvable problems JO - Funkcionalʹnyj analiz i ego priloženiâ PY - 1988 SP - 92 EP - 94 VL - 22 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FAA_1988_22_2_a22/ LA - ru ID - FAA_1988_22_2_a22 ER -