%0 Journal Article %A O. A. Bogoyavlenskaya %T On deformations of metrics with holonomy $Spin(3,4)$ on cones over pseudo-Riemannian manifolds %J Sibirskie èlektronnye matematičeskie izvestiâ %D 2015 %P 940-946 %V 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/SEMR_2015_12_a47/ %G ru %F SEMR_2015_12_a47