“DETERMINATION AND EVALUATION OF RELATIONSHIP BETWEEN THE PRICES OF CRUDE OIL SALES PRICE OF FIVE PETROLEUM PRODUCTS AND CREATING A MODEL FOR THE PRICING OF PETROLEUM PRODUCTS”, SJBEM, vol. 4, no. (8), pp. 23–34, Aug. 2015, Accessed: Jul. 06, 2026. [Online]. Available: https://singaporeanjbem.com/index.php/SJBEM/article/view/527