%0 Journal Article
%A Giannoni, F.
%A Masiello, A.
%A Piccione, P.
%T A Morse theory for light rays on stably causal lorentzian manifolds
%J Annales de l'I.H.P. Physique théorique
%D 1998
%P 359-412
%V 69
%N 4
%I Gauthier-Villars
%U http://www.numdam.org/item/AIHPA_1998__69_4_359_0/
%G en
%F AIHPA_1998__69_4_359_0