%0 Journal Article
%A P. P. Zabreiko
%T Tangential vectors for sets defined with systems of equations
%J Trudy Instituta matematiki
%D 2012
%P 42-49
%V 20
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TIMB_2012_20_1_a4/
%G ru
%F TIMB_2012_20_1_a4