Duan, Lian, Iqbal S. Sohal, and Wai-Fah Chen. “Closure: On Beam-Column Moment Amplification Factor”. Engineering Journal 27, no. 4 (December 31, 1990): 171–172. Accessed February 13, 2025. https://ej.aisc.org/index.php/engj/article/view/564.