%0 Journal Article
%A E. Śliwiński
%T On some oscillation problems for the equation \(\Delta^{(n)}u-f(r)u = 0\) in a three-dimensional space
%J Commentationes Mathematicae
%D 1964
%P  119-120
%V 8
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.14708/cm.v8i2.5517/
%R 10.14708/cm.v8i2.5517
%G pl
%F 10_14708_cm_v8i2_5517