TY - JOUR AU - David Jerison TI - Regularity of the Poisson kernel and free boundary problems JO - Colloquium Mathematicum PY - 1990 SP - 547 EP - 568 VL - 60 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm-60-61-2-547-568/ DO - 10.4064/cm-60-61-2-547-568 LA - en ID - 10_4064_cm_60_61_2_547_568 ER -