TY - JOUR AU - Nikolay Kuznetsov TI - Characterization of balls via solutions of the modified Helmholtz equation JO - Comptes Rendus. Mathématique PY - 2021 SP - 945 EP - 948 VL - 359 IS - 8 PB - Académie des sciences, Paris DO - 10.5802/crmath.250 LA - en ID - CRMATH_2021__359_8_945_0 ER -