%0 Journal Article
%A I. A. Firdman
%T Algebraic classification of physical structures with a~zero. II.~Topological aspects
%J Sibirskij žurnal industrialʹnoj matematiki
%D 2006
%P 135-146
%V 9
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SJIM_2006_9_1_a11/
%G ru
%F SJIM_2006_9_1_a11