Vukčević, M., M. Janjić, and N. Šibalić. “Numerical Simulation in Bulk Forming Process”. Advanced Technologies and Materials, vol. 32, no. 1-2, Dec. 2007, pp. 47-56, https://jged.uns.ac.rs/index.php/atm/article/view/jtp.2007.32.1-2.5.