Khan AH, Batool N, Aziz A. Recovery of Base Oil from Used Oil through Solvent Extraction Followed by Adsorption: A Review. Environmental Protection Research [Internet]. 2023 Sep. 27 [cited 2025 Apr. 16];3(2):319-40. Available from: https://ojs.wiserpub.com/index.php/EPR/article/view/2592