%0 Journal Article
%A V. A. Toponogov
%T Extremal theorems for Riemannian spaces with curvature bounded from above
%J Doklady Akademii Nauk
%D 1969
%P 300-302
%V 184
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1969_184_2_a10/
%G ru
%F DAN_1969_184_2_a10