Vo, Duy-Quang, and Hoang Lan Ton-That. “Free Vibration of Simply Supported Steel I-Girders With Trapezoidal Web Corrugations”. Reports in Mechanical Engineering 1, no. 1 (November 29, 2020): 141-150. Accessed June 26, 2022. https://frontpres.rabek.org/index.php/asd/article/view/15.