Zhu, Lei, Ze-Da Meng, Chong-Yeon Park, Trisha Ghosh, and Won-Chun Oh. 2012. “Hydrothermal Synthesis and Visible Light Photocatalytic Behaviour of Ag2S and Ag2S-TiO2 Nanoparticles”. Asian Journal of Chemistry 25 (2):726-30. https://doi.org/10.14233/ajchem.2013.12738.