N. Roslan, H. O. Lintang, S. Endud, M. B. Bakar, and Z. Ramli, “Synthesis of mesoporous SBA-15/ionic liquid nanocomposites for the selective oxidation of 2,3,6-trimethylphenol”, Malay. J. Catal., vol. 1, no. 1, Oct. 2016.