Nguyen, T. H., and E. Ghorbel. “Effects of Bacillus Subtilis on the Compressive Strength, Porosity and Rapid Chloride Permeability of Concrete”. Academic Journal of Civil Engineering 37, no. 2 (June 26, 2019): 223-228. Accessed March 28, 2024. https://journal.augc.asso.fr/index.php/ajce/article/view/867.