%0 Journal Article
%A Gudlaugur Thorbergsson
%T Non-hyperbolic closed geodesics.
%J Mathematica Scandinavica
%D 1979
%P 135-148
%V 44
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MS2_1979__44_166637/
%F MS2_1979__44_166637