TY  - JOUR
AU  - Khavinson, Dmitry
TI  - An Extremal Problem for Harmonic Functions in the Ball
JO  - Canadian mathematical bulletin
PY  - 1992
SP  - 218
EP  - 220
VL  - 35
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1992-031-8/
DO  - 10.4153/CMB-1992-031-8
ID  - 10_4153_CMB_1992_031_8
ER  -