%0 Journal Article
%A Michael J. Evans
%T On continuous functions and the approximate symmetric derivatives
%J Colloquium Mathematicum
%D 1974
%P 129-136
%V 31
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/cm-31-1-129-136/
%R 10.4064/cm-31-1-129-136
%G en
%F 10_4064_cm_31_1_129_136