%0 Journal Article
%A N. V. Efimov
%T Impossibility of an isometric imbedding in Euclidean 3-space of certain manifolds with negative Gaussian curvature
%J Doklady Akademii Nauk
%D 1962
%P 296-299
%V 146
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1962_146_2_a9/
%G ru
%F DAN_1962_146_2_a9