%0 Journal Article
%A Jan Malý
%A Luděk Zajı́ček
%T Approximate differentiation: Jarník points
%J Fundamenta Mathematicae
%D 1991
%P 87-97
%V 140
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/fm-140-1-87-97/
%R 10.4064/fm-140-1-87-97
%G en
%F 10_4064_fm_140_1_87_97