TY - JOUR AU - Attalienti, Antonio AU - Rasa, Ioan TI - Shape-preserving properties and asymptotic behaviour of the semigroup generated by the Black-Scholes operator JO - Czechoslovak Mathematical Journal PY - 2008 SP - 457 EP - 467 VL - 58 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMJ_2008__58_2_a10/ LA - en ID - CMJ_2008__58_2_a10 ER -