Pathak, C.S., and M.K. Mandal. “Optical Properties of Mn2+ Doped ZnS Nanoparticles”. Asian Journal of Chemistry 23, no. 10 (August 3, 2011): 4655–4658. Accessed July 23, 2024. https://asianpubs.org/index.php/ajchem/article/view/10921.