1. Callister, W. D. and Rethwisch, D.G. (2011). Material Science and Engineering, 8th Edition, SI Version. Hoboken: John Wiley & Sons, Inc.
2. Batzill, M. and Diebold, U. (2005). The surface and materials science of tin oxide, Program in Surface Science Elsevier, 79: 47–15.
3. Carvalho et al. (2012). Synthesis and characterization of SnO2 thin films prepared by dip-coating method, 15th Brazilian Workshop on Semiconductor Physics. Elsevier Physics Procedia, 28: 22–27.
4. Pankove. (1971). Optical Properties in Semiconductors. New York: Dove Publication Inc.
5. Razeghizadeh, A. R, et. al. (2015). Gramowth and Optical Properties Investigation of UN-Doped and Al-doped SnO2 Nanostructures by Sol-Gel Method. Department of Physics, Faculty of science Payamenoor University, IRAN.