Ashrafi A , Jaafar A.B , Lee L.S , Abu Bakar M.R. A Slacks-Based measure of sufficiency in two-stage
data envelopment analysis.int.Journal of math.analysis 2011;29;1435-1444.
 Charnes A,Cooper WW,Rhodes E. Measuring the efficiency of decision making units . European Journal
of operational Research 1978;2:429-444.
 Doyl J,Green R. Efficiency and cross-efficiency in DEA: derivation, meanings and uses. Journal of
theoperational Research Society 1994;5:567-78.
 F¨are R,Grosskopf S.NetworkDEA.Socio-EconomicPlanningSciences 2000;34:35–49.
 Kao C,Hwang SN. Efficiency decomposition in two-stage data envelopment analysis : an application to
non-life insurance companies in Taiwan. European Journal of operational Research 2008;185:418-29.
 Liang L, Cook WD,Zhu J. DEA models for two-stage processes :game approach and efficiency
ecomposition .Naval Research logistics 2008;55:643-653.
 Li Y,Chen Y,liang L,Xie J. DEA models for extended two-stage network structures . Omega 2012 ; 40
 Tone K, Tsutsui M. Network DEA: a slacks-based measure approach. European Journal of Operational