TY - JOUR AU - Luca Lombardini TI - Approximation of sets of finite fractional perimeter by smooth sets and comparison of local and global s-minimal surfaces JO - Interfaces and free boundaries PY - 2018 SP - 261 EP - 296 VL - 20 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.4171/ifb/402/ DO - 10.4171/ifb/402 ID - 10_4171_ifb_402 ER -