“Model of Plastic Strain of Material on a Free Surface of Cylindrical Patterns During Axial-Symmetric Compression. Part 1. Approximation of Strains”. Visnyk of Vinnytsia Politechnical Institute, no. 2 (November 12, 2010): 97–102. Accessed October 20, 2026. https://visnyk.vntu.edu.ua/index.php/visnyk/article/view/1713.