M. Rathipraba, M. V. S. V. “Numerical Investigation on Strength and Behaviour of Cold Formed Steel Built-up Open and Closed Section Columns”. International Journal of Advanced Science and Technology, Vol. 29, no. 3, Mar. 2020, pp. 5200 -11, https://sersc.org/journals/index.php/IJAST/article/view/6026.