Shi, Dongdong, Meicheng Yang, Juan Chen, and Jian Ma. “Experimental Study on Unidirectional Pedestrian Descending and Ascending Stair With a Fixed Obstacle”. Collective Dynamics 6 (February 13, 2022): 1–14. Accessed June 17, 2024. https://collective-dynamics.eu/index.php/cod/article/view/A127.