%0 Journal Article
%A Schmidt, E. J. P. Georg
%T On an Extremal Problem Involving Harmonic Functions
%J Canadian mathematical bulletin
%D 1988
%P 63-69
%V 31
%N 1
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1988-010-6/
%R 10.4153/CMB-1988-010-6
%F 10_4153_CMB_1988_010_6