%0 Journal Article
%A C.-S. Barbat 
%T A Generalization of Ivory's Theorem
%J Journal for geometry and graphics
%D 2014
%P 7-21
%V 18
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/JGG_2014_18_1_JGG_2014_18_1_a1/
%F JGG_2014_18_1_JGG_2014_18_1_a1