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. Singaporean Journal of Business Economics and Management, [S. l.], v. 4, n. (8), p. 23–34, 2015. Disponível em: https://singaporeanjbem.com/index.php/SJBEM/article/view/527. Acesso em: 6 jul. 2026.