Hu, Z., H. Wielage, and F. Vollertsen. “Economic Micro Forming Using DLC- and TiN-Coated Tools”. Advanced Technologies and Materials, vol. 36, no. 2, Dec. 2011, pp. 51-59, https://jged.uns.ac.rs/index.php/atm/article/view/jtp.2011.36.2.1.