Shakohe, Rawad. “Study the Effect of Adding Materials (Calcine Powder Styropor Granules and Straw) on the Compressive Strength for Material Polyurethane”. Latakia University Journal -Engineering Sciences Series 45, no. 1 (March 15, 2023): 143–154. Accessed January 22, 2025. https://journal.tishreen.edu.sy/index.php/engscnc/article/view/13725.