Sicakova, A., E. Kardosova, and M. Spak. “Perlite Application and Performance Comparison to Conventional Additives in Blended Cement”. Engineering, Technology & Applied Science Research 10, no. 3 (June 7, 2020): 5613–5618. Accessed January 24, 2025. https://www.etasr.com/index.php/ETASR/article/view/3487.