%0 Journal Article
%A Fr. Fabricius-Bjerre
%T On the Double Tangents of Plane Closed Curves.
%J Mathematica Scandinavica
%D 1962
%P 113-116
%V 11
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MS2_1962__11_165818/
%F MS2_1962__11_165818