%0 Journal Article
%A S. Stamatakis
%A I. Kaffas
%A I.-I. Papadopoulou 
%T Characterizations of Ruled Surfaces in R3 and of Hyperquadrics in Rn+1 via Relative Geometric Invariants
%J Journal for geometry and graphics
%D 2014
%P 217-223
%V 18
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/JGG_2014_18_2_JGG_2014_18_2_a6/
%F JGG_2014_18_2_JGG_2014_18_2_a6