Nagaraja, R., et al. “Solution Combustion Synthesis, Characterization and Photocatalytic Activity of Nanosized ZnO Catalyst for Textile Industrial Dye Effluents Degradation”. Asian Journal of Chemistry, vol. 23, no. 11, Sept. 2011, pp. 5040-4, https://asianpubs.org/index.php/ajchem/article/view/11033.