M. G., A. K., S. K. M., S. K., V. S., V. T. R., S. S., and J. Nayak. “Fly Ash Cenospheres – A Resourceful Material for Engineering Applications”. Power Research - A Journal of CPRI, Mar. 2015, pp. 207-22, https://cprijournal.in/index.php/pr/article/view/761.