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Catalytic Cracking of Vacuum Gas Oil and Used Lubricating Oil on Oil Shale Ash. Glob. J. Energy. Technol. Res. Updates. [Internet]. 2015 Apr. 1 [cited 2026 Mar. 1];2(1):25-32. Available from: https://avanti-journals.com/index.php/gjetru/article/view/193