TY - JOUR AU - E.N.Barron TI - Lax formula for obstacle problems JO - Minimax theory and its applications PY - 2019 VL - 4 IS - 2 UR - http://geodesic.mathdoc.fr/item/MTA_2019_4_2_a6/ ID - MTA_2019_4_2_a6 ER -