Prabhakar, Vidya, and Ashrit P. “Effect of Substrate on the Electro Chromic Properties of Tungsten Trioxide Thin Films”. International Journal of Engineering and Technology 3, no. 2 (May 10, 2014): 245–251. Accessed August 18, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/2084.