TY - JOUR AU - Alexander G. Ramm TI - Injectivity of the spherical means operator JO - Comptes Rendus. Mathématique PY - 2002 SP - 1033 EP - 1038 VL - 335 IS - 12 PB - Elsevier DO - 10.1016/S1631-073X(02)02608-0 LA - en ID - CRMATH_2002__335_12_1033_0 ER -