Karabegović, E., K. Stupac, and M. Mahmić. “Hydroforming of Welded and Seamless Tubes”. Advanced Technologies and Materials, vol. 40, no. 2, Dec. 2015, pp. 35-42, https://atm-journal.uns.ac.rs/index.php/atm/article/view/JTP.2015.40.2.4.