TY - JOUR AU - A. Torgašev TI - Roots of positive and negative operators on Wachs spaces JO - Matematički vesnik PY - 1976 SP - 227 VL - 28 IS - 2 UR - http://geodesic.mathdoc.fr/item/MV_1976_28_2_a12/ ID - MV_1976_28_2_a12 ER -