Himmer, T., M. Lütke, L. Morgenthal, E. Beyer, and C. Bratt. “Cutting Applications With High Brightness Lasers”. Advanced Technologies and Materials, vol. 33, no. 1-2, Dec. 2008, pp. 63-71, https://atm-journal.uns.ac.rs/index.php/atm/article/view/jtp.2008.33.1-2.6.