%0 Journal Article
%A Chan Fyong Zung
%T Homotopy groups of the $3$-groupoid of regular \textit{Ann}-categories
%J Vestnik Moskovskogo universiteta. Matematika, mehanika
%D 1994
%P 3-6
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/VMUMM_1994_5_a0/
%G ru
%F VMUMM_1994_5_a0