%0 Journal Article %A Kuznetsov, Nikolay %T Characterization of balls via solutions of the modified Helmholtz equation %J Comptes Rendus. Mathématique %D 2021 %P 945-948 %V 359 %N 8 %I Académie des sciences, Paris %U http://www.numdam.org/articles/10.5802/crmath.250/ %R 10.5802/crmath.250 %G en %F CRMATH_2021__359_8_945_0