Khalid, Muhammad Aminuddin, et al. “Optimal Slope Angles and Berm Configurations for Rockfall Hazard Reduction Using Discrete Element Modelling and Statistical Analysis”. International Journal of Sustainable Construction Engineering and Technology, vol. 17, no. 1, July 2026, pp. 288-02, https://journal.uthm.edu.my/index.php/IJSCET/article/view/21841.