%0 Journal Article
%A M. Sh. Yakupov
%T Einstein's spaces of the second order of immersion
%J Doklady Akademii Nauk
%D 1968
%P 1096-1098
%V 180
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1968_180_5_a23/
%G ru
%F DAN_1968_180_5_a23