1. D. Beyersmann, in: E. Merian (Ed.), Metals and Their Compounds in the Environment, VCH, Weinheim, 1991, p. 491
2. F. Kieffer, in: E. Merian (Ed.), Metals and Their Compounds in the Environment, VCH, Weinheim, 1991, p. 481
3. R.C. Wilmoth, S.J. Hubbard, J.O. Burckle, in: E. Merian (Ed.), Metals and Their Compounds in the Environment, VCH, Weinheim, 1991, p. 19
4. B. Raspor, in: E. Merian (Ed.), Metals and Their Compounds in the Environment, VCH, Weinheim, 1991, p. 233
5. Heavy Metals Complexed with Humic Substances in Fresh Water.