%0 Journal Article
%A M. K. Saad
%A G. Weiss 
%T Curvature Lines and Normal Congruences of Triangular B�zier Patches
%J Journal for geometry and graphics
%D 2012
%P 29-4
%V 16
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/JGG_2012_16_1_JGG_2012_16_1_a3/
%F JGG_2012_16_1_JGG_2012_16_1_a3