Pavlikov, A. M., and O. A. Krupchenko. 2011. “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):123-25. https://doi.org/10.15802/stp2011/6886.