Sergei N. Nazarenko and Galina A. Grudcina 2021. Method of the Finite-Element Model Formation Containing the 3D Elements for Structural Calculations of the Reinforced Concrete Structures Considering the Crack Opening. Communications - Scientific letters of the University of Zilina. 23, 1 (Jan. 2021), D15-D25. DOI:https://doi.org/10.26552/com.C.2021.1.D15-D25.