%0 Journal Article
%A Behnaz Tolue
%A Parvaneh Zolfaghari
%A Gholamreza Moghaddasi
%T Free ultra-groups, generators and relations
%J Algebra and discrete mathematics
%D 2019
%P 308-316
%V 28
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ADM_2019_28_2_a12/
%G en
%F ADM_2019_28_2_a12