Kouraim, M. N., Fawzy, M. M. and Helaly, O. S. (2014) “Leaching of Lanthanides from Phosphogypsum Waste using Nonyl Phenol Ethoxylate Associated with HNO3 and HCl”, International Journal of Sciences: Basic and Applied Research (IJSBAR), 16(2), pp. 31–44. Available at: https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/2065 (Accessed: 3 July 2024).