Weiss, D., Biesold, H., Jovanovic, P., Juhàsz, L., Laciok, A., Leopold, K., Michalik, B., Moravanská, H., Poffijn, A., Popescu, M., Rdulescu, C., Szerbin, P. and Wiegand, J. (2005) Natural Occurring Radioactive Materials (NORM IV). Proceedings of an International Conference, Szczkyrk, 17-21 May 2004, 147-155. - References - Scientific Research Publishing