%0 Journal Article
%A Preiss, David
%T Approximate derivatives and Baire classes
%J Czechoslovak Mathematical Journal
%D 1971
%P 373-382
%V 21
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1971.101037/
%R 10.21136/CMJ.1971.101037
%G en
%F 10_21136_CMJ_1971_101037