TY - JOUR AU - Emmanuel N. Barron AU - Robert Jensen TI - Hopf formulas for nonlinear obstacle problems JO - Minimax theory and its applications PY - 2020 VL - 5 IS - 2 UR - http://geodesic.mathdoc.fr/item/MTA_2020_5_2_a0/ ID - MTA_2020_5_2_a0 ER -