%0 Journal Article
%A K. K. Golovkin
%T Geometric smoothness characteristics of functions of two variables
%J Informatics and Automation
%D 1964
%P 139-158
%V 73
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TRSPY_1964_73_a4/
%G ru
%F TRSPY_1964_73_a4