Getaye, M., O. P. Yadav, A. Taddesse, and D. V. S. Jain. “Effect on Photo-Catalytic Activity of Zinc Oxide Nanoparticles Upon Doping With Silver and Sulphur in Degradation Reaction of Malachite Green”. Journal of Surface Science and Technology, vol. 31, no. 1-2, June 2015, pp. 69-76, doi:10.18311/jsst/2015/1704.