TY - JOUR AU - Xicheng Zhang TI - Regularity of stopping times of diffusion processes in Besov spaces JO - Studia Mathematica PY - 2002 SP - 23 EP - 29 VL - 151 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/sm151-1-2/ DO - 10.4064/sm151-1-2 LA - en ID - 10_4064_sm151_1_2 ER -