Šugár, Peter, J. Šugárová, and M. Kolník. “Technology-Based Sheet Metal Classification and Coding System”. Advanced Technologies and Materials 36, no. 1 (June 30, 2011): 1–8. Accessed October 10, 2024. http://sp.ftn.uns.ac.rs/index.php/atm/article/view/jtp.2011.36.1.1.