Hassan Tajik Ghashghaei, Abolfazl Hassani, and Morteza Ahmadi. “Investigating the Relationship Between Porosity and Compressive Strength for Porous Concrete As a Sustainable Pavement”. The Global Environmental Engineers 2, no. 2 (December 31, 2015): 65–70. Accessed March 29, 2024. https://www.avantipublishers.com/index.php/tgevnie/article/view/326.