T. Аzizov, N. Sribnyak, L. Tsyganenko, and O. Yurin, “The Issue of Determination of the Rigidity Characteristics of Reinforced Concrete Elements with Normal Cracks”, IJET, vol. 7, no. 4.8, pp. 185–189, Oct. 2018, doi: 10.14419/ijet.v7i4.8.27238.