"Comparative Study of Different Fuzzy Models for Gas Compressibility Factor Prediction: Comparative Study" (2023) Hadhramout University Journal of Natural & Applied Sciences, 18(1). موجود في: https://hu.edu.ye/hu-publications/journals/index.php/hujnas/article/view/101 (تاريخ الوصول: 30 يوليو 2026).