%0 Journal Article %A Armitage, D. H. %T On the derivatives at the origin of entire harmonic functions %J Glasgow mathematical journal %D 1979 %P 147-154 %V 20 %N 2 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500003864/ %R 10.1017/S0017089500003864 %F 10_1017_S0017089500003864