%0 Journal Article %A Göran Wanby %T A generalization of the Phragmén-Lindelöf principle for elliptic differential equations. %J Mathematica Scandinavica %D 1978 %P 259-274 %V 43 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1978__43_166619/ %F MS2_1978__43_166619