%0 Journal Article
%A Yu. D. Burago
%T Three-dimensional open Riemannian space of nonnegative curvature
%J Zapiski Nauchnykh Seminarov POMI
%D 1976
%P 103-113
%V 66
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ZNSL_1976_66_a1/
%G ru
%F ZNSL_1976_66_a1