TY - JOUR AU - Ambrosetti, Antonio AU - Malchiodi, Andrea AU - Ni, Wei-Ming TI - Solutions, concentrating on spheres, to symmetric singularly perturbed problems JO - Comptes Rendus. Mathématique PY - 2002 SP - 145 EP - 150 VL - 335 IS - 2 PB - Elsevier UR - http://archive.numdam.org/articles/10.1016/S1631-073X(02)02414-7/ DO - 10.1016/S1631-073X(02)02414-7 LA - en ID - CRMATH_2002__335_2_145_0 ER -