A. Saymeh, Riyadh, et al. “Gas Phase Study of O-Xylen Hydrogenation over Pt Al2O3: The Influence of Ce and the Catalyst Reduction Temperature on Selectivity ”. Asian Journal of Chemistry, vol. 9, no. 3, Mar. 2010, pp. 350-8, https://asianpubs.org/index.php/ajchem/article/view/23882.