%0 Journal Article
%A M. Kuczma
%T On squares of differentiable functions
%J Annales Polonici Mathematici
%D 1969
%P 229-237
%V 22
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/ap-22-2-229-237/
%R 10.4064/ap-22-2-229-237
%G en
%F 10_4064_ap_22_2_229_237