Dan NiĊ£oi. "CONTRIBUTIONS REGARDING DETERMINATION THE POSSIBLE DEFECTS THAT OCCURS IN THE RECONDITIONING PROCESS BY ULTRASONIC WELDING." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Energy and Clean Technologies (2018): 235-242. https://doi.org/10.5593/sgem2018/4.1/s17.031