1. Metal complexes present in sea water;Ahrland,1975
2. Amphoteric properties of EDTA and the stability of its metal complexes;Beck;Acta Chim. Hung.,1960
3. On the state of manganese and gold traces in aqueous solutions;Beneš;J. Inorg. Nucl. Chem.,1967
4. Redox levels in the sea;Breck,1974
5. Titrations;Flaschka,1959