Prabhakar, Vidya, and Ashrit P. “Effect of Substrate on the Electro Chromic Properties of Tungsten Trioxide Thin Films”. International Journal of Engineering & Technology 3, no. 2 (May 10, 2014): 245–251. Accessed May 4, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/2084.