1. W. HEBEL, G. COTTONE, Radioactive Waste Management, Vol. 7, Harwood Academic Publishers, 1982.
2. F. J. HERRMANN, R. GRZIWA, L. FINSTERWALDER, D. FANG, B. HERRMANN, V. MOTOI, CH. BEYER, Jahrestagung Kerntechnik '92.
3. F. J. HERRMANN, V. MOTOI, B. HERRMANN, D. FANG, L. FINSTERWALDER, K. D. KUHN, A. VAN SCHORR, CH. BEYER, 22nd DOE/NRC Nuclear Air Cleaning and Treatment Conf. Denver, 1992.
4. J. FURRER, J. G. WILHELM, K. JANNAKOS, 15th Doe Nuclear Air Cleaning Conference, Boston, 1978.
5. J. G. WILHELM, J. FURRER, E. SCHULTES, 14th ERDA Air Cleaning Conference, p. 1977, 447.