Konkol, Janusz, and Grzegorz Prokopski. “The Optimization of Concretes Modified With FBC Fly Ash”. Roads and Bridges – Drogi i Mosty 13, no. 2 (April 1, 2014): 103–114. Accessed April 2, 2025. https://rabdim.pl/index.php/rb/article/view/v13n2p103.