%0 Journal Article
%A G. I. Zhotikov
%T On the theory of the field of local conic surfaces in the composite tangent manifold $E_n(X_n)$ of first order.~I,~II
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1959
%P 64-69
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1959_4_a8/
%G ru
%F IVM_1959_4_a8