%0 Journal Article
%A E. A. Konoval'chik
%A K. V. Kostousov
%T Symmetrical $2$-extensions of the $2$-dimensional grid. II
%J Trudy Instituta matematiki i mehaniki
%D 2017
%P 192-211
%V 23
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TIMM_2017_23_4_a18/
%G ru
%F TIMM_2017_23_4_a18