Pavlikov, A. M., and O. A. Krupchenko. “Composite Steel and Concrete Beams, I-Beams Are in the Supercritical Stage of Concrete Working, Their strength’s Analysis of Normal Sections”. Science and Transport Progress , no. 39 (December 25, 2011): 123–125. Accessed May 3, 2024. https://stp.ust.edu.ua/article/view/6886.