%0 Journal Article
%A Matyska, Jiří
%T Approximate differential and Federer normal
%J Czechoslovak Mathematical Journal
%D 1967
%P 97-107
%V 17
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1967.100764/
%R 10.21136/CMJ.1967.100764
%G en
%F 10_21136_CMJ_1967_100764