Liu, Tong, and Jinhui Hou. “Binary Metal Oxide Supported on TiO2 Catalysts for Selective Oxidation of Benzene to Phenol Under Microwave Irradiation”. Asian Journal of Chemistry, vol. 27, no. 8, Apr. 2015, pp. 2809-12, doi:10.14233/ajchem.2015.18065.