Sah, S. K. ., B. . Nirala, A. . Kumar, and A. . Anand. “Study on the Characterization and Classification of Fly Ash Samples Obtained Locally”. Middle European Scientific Bulletin, vol. 37, June 2023, pp. 14-19, https://cejsr.academicjournal.io/index.php/journal/article/view/1803.