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 [Internet]. 2015 Aug. 31 [cited 2026 Aug. 27];4((8):23-34. Available from: https://www.singaporeanjbem.com/index.php/SJBEM/article/view/527