Kamal, Heba, and . . “Performance of New Austrian Tunneling Method (NATM) in Weak Rock Case Study”. International Journal of Engineering and Technology 7, no. 4.20 (November 28, 2018): 40–45. Accessed May 12, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/25847.