TY - JOUR AU - Fioravante Patrone AU - Julian Revalski TI - Characterizations of Tikhonov Well-Posedness for Preorders JO - Mathematica balkanica PY - 1991 SP - 146 VL - 5 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MABA_1991_5_2_a7/ ID - MABA_1991_5_2_a7 ER -