%0 Journal Article
%A E. Kozniewski 
%T On the Existence of Shapes of Roofs
%J Journal for geometry and graphics
%D 2004
%P 185-198
%V 8
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/JGG_2004_8_2_JGG_2004_8_2_a5/
%F JGG_2004_8_2_JGG_2004_8_2_a5