Šljivić, M., and B. Mišić. 2001. “Production Development of One Axial - Symmetrical Work-Piece Out of Seam Tube through Necking-in Method”. Advanced Technologies and Materials 26 (2):27-33. https://atm-journal.uns.ac.rs/index.php/atm/article/view/jtp.2001.27.2.3.