أبودرعه ع. ., خيربك ع., and مكيّة س. “The Correlation Between the Gas Permeability of Concrete and Its Compressive Strength”. Tishreen University Journal -Engineering Sciences Series, vol. 45, no. 3, July 2023, pp. 395-0, https://journal.tishreen.edu.sy/index.php/engscnc/article/view/14457.