1. Katz JJ, Seaborg GT, Morss LR (eds) (1986) The chemistry of the actinide elements. Chapman & Hall, New York
2. Kersting AB, Efurd DW, Finnegan DL, Rokop DJ, Smith DK, Thompson JL (1999) Nature 397:56–59
3. Stevenson FJ (1994) Humus chemistry. Wiley, New York
4. Orlov DS (1995) Humic substances of soils and general theory of humification. Balkema, Brookfeld, VT
5. Sachs S, Schmeide K, Reich T, Brendler V, Heise KH, Bernhard G (2005) Radiochim Acta 93:17–25