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• Haghighi.Davoud Efficiency Evaluation of Railway Freight Stations by Using DEA Approach [ Vol.12, Issue 2 - Spring Year 2020]
• Halilu.Abubakar A New Hybrid Conjugate Gradient Method Based on Secant Equation for Solving Large Scale Unconstrained Optimization Problems [ Vol.12, Issue 1 - Winter Year 2020]