Козбур, Г. В., О. К Шкодзінський, and І. Р. Козбур. “Construction of a Generalized Hardening Curve for Isotropic Plastic Metal Materials”. Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas, no. 1(48) (July 27, 2020): 38–46. Accessed January 21, 2021. https://nv.nung.edu.ua/index.php/nv/article/view/731.