%0 Journal Article
%A Zajíček, Luděk
%T On approximate Dini derivates and one-sided approximate derivatives of arbitrary functions
%J Commentationes Mathematicae Universitatis Carolinae
%D 1981
%P 549-560
%V 22
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMUC_1981__22_3_a8/
%G en
%F CMUC_1981__22_3_a8