Buriennikov, Y. A., and K. I. Kotsiubivska. “Deflected Mode and Limit Forming During Radial Extrusion”. Visnyk of Vinnytsia Politechnical Institute, no. 4, Nov. 2010, pp. 63-72, https://visnyk.vntu.edu.ua/index.php/visnyk/article/view/321.