Rychlik, Kazimierz, and Cezary Senderowski. 2020. “Wear Analysis of Gun Barrel Drill Blade in 1.0503 Steel Drilling Process in Milpro HG12 Oil Environment With Addition of Ultra-Dispersive Copper Particles and Copper Oxides”. Technical Sciences 22 (3):221-35. https://doi.org/10.31648/ts.4966.