1. Holodnik K., Jurdziak L., Kawalec W., Krysa Z., Milczarek W., Paszkowska G., Pattinson D., Simpson. R.Raport, (archive material) (2015)
2. Drzymala. J., Kowalczuk P.B.,in Proceedings of the 12th International Mineral Processing Symposium, (Cappadocia, Turkey, 1191, 2010)