Kačmarčik, I., D. Movrin, and A. Ivanišević. “One Contribution to the Friction Investigation in Bulk Metal Forming”. Advanced Technologies and Materials, vol. 36, no. 1, June 2011, pp. 35-48, https://jged.uns.ac.rs/index.php/atm/article/view/jtp.2011.36.1.5.