TY - JOUR AU - Caffarelli, L. AU - Lin, Fang-Hua TI - Singularly perturbed elliptic systems and multi-valued harmonic functions with free boundaries JO - Journal of the American Mathematical Society PY - 2008 SP - 847 EP - 862 VL - 21 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-08-00593-6/ DO - 10.1090/S0894-0347-08-00593-6 ID - 10_1090_S0894_0347_08_00593_6 ER -