%0 Journal Article %A J. Musialek %T Some properties of zeros of solutions of second-order linear partial differential equations of elliptic type %J Commentationes Mathematicae %D 1966 %P 27-36 %V 10 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14708/cm.v10i1.5573/ %R 10.14708/cm.v10i1.5573 %G pl %F 10_14708_cm_v10i1_5573