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• Rahmani Parchikolaei.bijan Network ‎D‎ata Envelopment Analysis Models For Measuring Efficiency Of a Four-Stage Supply Chain With Returned Outputs‎ [ Vol.10, Issue 3 - Summer Year 2018]
• Rashidi.Mahdis An Efficient Schulz-type Method to Compute the Moore-Penrose Inverse [ Vol.10, Issue 2 - Spring Year 2018]
• Reyhani.Ebrahim Comparative Content Analysis of Mathematics Textbooks in first Grade Students of Elementary Schools in Iran, Japan and America [ Vol.10, Issue 3 - Summer Year 2018]
• Riahifar.Abbas Application of Laguerre Polynomials for Solving Infinite Boundary Integro-Differential Equations [ Vol.10, Issue 2 - Spring Year 2018]
• Rostamy Malkhalifeh.mohsen A New Method for Optimization of Inefficient Cost Units In The Presence of Undesirable ‎Outputs‎ [ Vol.10, Issue 4 - Autumn Year 2018]