Gołaszewski, Jacek, and Tomasz Ponikiewski. “The Effect of Calcareous Fly Ash on Selected Properties of New Generation of Concrete”. Roads and Bridges – Drogi i Mosty 12, no. 2 (February 1, 2014): 209–222. Accessed April 17, 2025. https://rabdim.pl/index.php/rb/article/view/v12n2p209.