David-West, Opukuro. “Structural Dynamic Modelling of a Multi-Storey Shear Frame Using Mass and Stiffness Addition”. Journal of Mechanical Engineering and Technology (JMET) 12, no. 1 (May 31, 2020): 10–27. Accessed October 28, 2025. https://jmet.utem.edu.my/jmet/article/view/4493.