%0 Journal Article
%A shoga, mehdi, hoseinzadeh lotfi, farhad, غلام ابری, امیر, Rashidi Komijan, Alireza
%T Efficiency of 4 stage supply chain in presence of non discretionary ,  undesirable and negative factors Using SBM model in DEA
%J Economic  Modeling
%V 14
%N 51
%P 73-98
%D 2020
%R 10.30495/eco.2020.1899015.2357
%U https://sanad.iau.ir/fa/Article/993527