TY  - JOUR
AU  - Schmidt, E. J. P. Georg
TI  - On an Extremal Problem Involving Harmonic Functions
JO  - Canadian mathematical bulletin
PY  - 1988
SP  - 63
EP  - 69
VL  - 31
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1988-010-6/
DO  - 10.4153/CMB-1988-010-6
ID  - 10_4153_CMB_1988_010_6
ER  -