Khan, Easir A, et al. “Fixed-Bed Adsorption Separation Of Xylene Isomers over SiO2 Silicallite-1 Core-Shell Adsorbents”. Chemical Engineering Research Bulletin, vol. 16, no. 1, Dec. 2013, pp. 1-15, doi:10.3329/cerb.v16i1.17470.