Shateri, Nader, Masoud Saneie, and Hilda Saleh. “Cost, Revenue and Profit Efficiency Evaluation in Downstream Petrochemical Industries With Data Envelopment Analysis Approach With Fuzzy Data”. Annals of Optimization With Applications 1, no. 1 (March 23, 2025): 41–56. Accessed October 14, 2025. https://anowa.reapress.com/journal/article/view/34.