%0 Journal Article %A V. A. Sharafutdinov %T The radius of injectivity of a complete open manifold of nonnegative curvature %J Doklady Akademii Nauk %D 1976 %P 46-48 %V 231 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1976_231_1_a10/ %G ru %F DAN_1976_231_1_a10