%0 Journal Article
%A Ya. L. Shapiro
%T Reducible Riemannian spaces and two-sheeted structures on them
%J Doklady Akademii Nauk
%D 1972
%P 831-833
%V 206
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1972_206_4_a14/
%G ru
%F DAN_1972_206_4_a14