Velevska, J., M. Pecovska-Gjorgjevich, M. Najdoski, and N. Stojanov. “Studies on Electrochromism of Chemically Deposited Nickel Oxide Thin Films”. Science, Engineering and Health Studies, vol. 5, no. 1, Mar. 2013, pp. 34-42, doi:10.14456/sustj.2011.3.