%0 Journal Article
%A Preiss, David
%T Limits of derivatives (Preliminary communication)
%J Commentationes Mathematicae Universitatis Carolinae
%D 1968
%P 307-309
%V 9
%N 2
%U http://geodesic.mathdoc.fr/item/CMUC_1968_9_2_a10/
%G en
%F CMUC_1968_9_2_a10