Rahman, A. M., Salman, M. H., & Hammed, K. W. (2014). Catalytic Cracking of Iraqi Vacuum Gasoil Using Large and Medium Pore Size of Zeolite Catalysts. Al-Khwarizmi Engineering Journal, 11(1), 73-83. https://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/216