ABDUL-KARIM MOHAMMED, Abdul-Halim; SHEHAB AL – RUBAI, Amal Khalid. Viscosity Index Improvement of Lubricating Oil Fraction (SAE – 30). Iraqi Journal of Chemical and Petroleum Engineering, Baghdad, Iraq., v. 9, n. 3, p. 51–57, 2008. DOI: 10.31699/IJCPE.2008.3.8. Disponível em: https://ijcpe.uobaghdad.edu.iq/index.php/ijcpe/article/view/447.. Acesso em: 15 may. 2024.