Nguyen, P. C., D. D. Pham, T. T. Tran, and T. Nghia-Nguyen. “Modified Numerical Modeling of Axially Loaded Concrete-Filled Steel Circular-Tube Columns”. Engineering, Technology & Applied Science Research, vol. 11, no. 3, June 2021, pp. 7094-9, doi:10.48084/etasr.4157.