Al-Azri, K., R. Md Nor, M. Al-Ruqeishi, and Y. M. Amin. “The Influence of Substrate Location and Deposition Time on ZnO Nanostructures”. Malaysian Journal of Science, vol. 29, no. 2, Aug. 2010, pp. 180-7, doi:10.22452/mjs.vol29no2.10.