P, V., and K. Jeyasubramanian2. “Optical and Structural Studies of Graphene Oxide-Zinc Oxide Blend Nanoparticles for Optoelectronics Application”. Asian Journal of Chemistry, vol. 25, no. 20, May 2013, pp. 194-8, https://asianpubs.org/index.php/ajchem/article/view/25_Supplementary%20Issue_53.