1. Morgan JJ, Stumm W (1991) In: Merian E (ed) Metals and their compounds in the environment. Occurrence, analysis and biological relevance, Chapt. I.3 VCH, Weinheim
2. Buffle J (1988) Complexation reactions in aquatic systems. Ellis Horwood, Chichester
3. Neubecker TA, Allen HE (1983) Water Res 17:1?14
4. Olson BH, Panigrahi AK (1991) In: Merian (ed) Metals and their compounds in the environment. Occurrence, analysis and biological relevance, Chapt. 1.7h. VCH, Weinheim
5. Sunda WG, Guillard RRL (1976) J Mar Res 34:511?529