TY - JOUR AU - B. M. Levitan TI - Sturm-liouville operators on the whole line, with the same discrete spectrum JO - Sbornik. Mathematics PY - 1988 SP - 77 EP - 106 VL - 60 IS - 1 UR - http://geodesic.mathdoc.fr/item/SM_1988_60_1_a5/ LA - en ID - SM_1988_60_1_a5 ER -