%0 Journal Article
%A Chen, Xiaofa
%A Chen, Xiao-Wu
%T The lower extension groups and quotient categories
%J Comptes Rendus. Mathématique
%D 2019
%P 832-840
%V 357
%N 11-12
%I Elsevier
%U http://www.numdam.org/articles/10.1016/j.crma.2019.11.006/
%R 10.1016/j.crma.2019.11.006
%G en
%F CRMATH_2019__357_11-12_832_0