%0 Journal Article
%T [unknown]
%J Acta Facultatis Rerum Naturalium Universitatis Comenianae
%D 1967
%P 15-323
%V 17
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AFRNUC_1967__17_185778/
%F AFRNUC_1967__17_185778