MOUSA, K. M. .; AL-SAADY, F. A. A. .; MAHMOOD, M. E. . NICKEL RECOVERY FROM RESIDUE OF HEAVY OIL USING NITRIC ACID. Journal of Petroleum Research and Studies, [S. l.], v. 2, n. 2, p. 87-96, 2011. DOI: 10.52716/jprs.v2i2.43. Disponível em: https://jprs.gov.iq/index.php/jprs/article/view/43. Acesso em: 22 jul. 2024.