KOURAIM, M. N.; FAWZY, M. M.; HELALY, O. S. Leaching of Lanthanides from Phosphogypsum Waste using Nonyl Phenol Ethoxylate Associated with HNO3 and HCl. International Journal of Sciences: Basic and Applied Research (IJSBAR), [S. l.], v. 16, n. 2, p. 31–44, 2014. Disponível em: https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/2065. Acesso em: 3 jul. 2024.