Ali, Noha Muhsen, and Tariq Mohammed Naife. “Removal of Vanadium and Nickel Ions from Iraqi Atmospheric Residue by Using Solvent Extraction Method”. Iraqi Journal of Chemical and Petroleum Engineering 22, no. 1 (March 30, 2021): 15–20. Accessed May 4, 2024. https://ijcpe.uobaghdad.edu.iq/index.php/ijcpe/article/view/828.