Waśniewski, Tomasz, and Ewelina Kołodziejczyk. “Ductility and Internal Forces Redistribution in Lightweight Aggregate Concrete Beams”. Budownictwo i Architektura 19, no. 4 (November 2, 2020): 089-099. Accessed August 9, 2022. https://ph.pollub.pl/index.php/bia/article/view/2124.