%0 Journal Article
%T [unknown]
%J Acta mathematica Universitatis Comenianae
%D 1985
%P 7-12
%V 46-47
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AMUC_1985__46-47_185923/
%F AMUC_1985__46-47_185923