Moussa Ramadan, O., R. Ghazal, and K. Salem Gargees. “Preparation of Palladium Catalyst Loaded on Zeolite and Its Application in Qualitative Improvement of Heavy Naphtha”. Journal of Education and Science (JES), vol. 26, no. 5, Dec. 2013, pp. 108-1, doi:10.33899/edusj.2013.163093.