Mouli, Mohamed, and Hamid Khelafi. “Properties of Lightweight Concrete Made With Crushed Natural Pozzolana As Coarse Aggregate”. Technological and Economic Development of Economy 13, no. 4 (December 31, 2007): 259-265. Accessed November 28, 2024. https://mma.vgtu.lt/index.php/TEDE/article/view/7742.