Kamarudin, Ahmad Fahmy. “Evaluation of Steel Stairwell Dynamic Characteristics, Under Few Mass Configurations Using Ambient Vibration Method”. International Journal of Integrated Engineering 11, no. 6 (September 16, 2019): 224–235. Accessed July 1, 2024. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/4941.