J. Kent Hsiao. “Bending-Axis Effects on Load-Moment (P-M) Interaction Diagrams for Circular Concrete Columns Using a Limited Number of Longitudinal Reinforcing Bars”. Electronic Journal of Structural Engineering 12 (January 1, 2012): 10–16. Accessed November 24, 2024. https://ejsei.com/EJSE/article/view/147.