Jacek Feliks, Marcin Mazur. "SAFETY SYSTEMS AGAINST METALLIC CONTAMINATIONS IN FEED MATERIAL." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining, 2017, pp. 1043-1050. https://doi.org/10.5593/sgem2017/11/s04.133