%0 Journal Article
%A I. D. Novikov
%A L. M. Ozernoi
%T Propagation of light outside and inside a singular Schwarzschild sphere
%J Doklady Akademii Nauk
%D 1963
%P 1019-1021
%V 150
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1963_150_5_a17/
%G ru
%F DAN_1963_150_5_a17