%0 Journal Article
%A J.H. Reif
%A J.D. Tygar
%A A. Yoshida
%T Computability and Complexity of Ray Tracing.
%J Discrete & computational geometry
%D 1994
%P 265-288
%V 11
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DCG_1994__11_3_131302/
%F DCG_1994__11_3_131302