Prayuda, Hakas. “Repairing of Flexural Cracks on Reinforced Self-Healing Concrete Beam Using Bacillus Subtillis Bacteria”. International Journal of Integrated Engineering 12, no. 4 (May 14, 2020): 300–309. Accessed May 3, 2024. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/6318.