Ahmad khanlou Gharakhanlou, Maghsoud , Azarmir shotorbani, Nima, Tohidi, Ghasem, Razavyan, Shabnam, Abbasi, Rohollah (2022). Ranking of Decision-Making Units with Multi-Period Two-Stage Network Structure: a Method Based on Relative Data Envelopment Analysis. *Iranian Journal of Optimization*, 14(1), 67-80. https://doi.org/10.82521/IJO.2022.1018821