%0 Journal Article
%A H. Busemann
%T Extremals on closed hyperbolic space forms
%J Matematika
%D 1966
%P 140-145
%V 10
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAT_1966_10_4_a5/
%G ru
%F MAT_1966_10_4_a5