1. Manganese nodules as a source of copper and nickel — mineralogical assessment and extraction;Brooke;Trans. Inst. Min. Metall.,1969
2. Characterisation and extraction of metals from sea floor manganese nodules;Fuerstenau;Trans. Soc. Min. Eng., AIME,1973
3. Preferential acid leaching of nickel, copper and cobalt from ocean floor manganese nodules;Han;Trans. Inst. Min. Metall.,1975
4. Hydrometallurgy of manganese nodules II: Leaching of copper, nickel and cobalt from manganese nodules with sulphuric acid;Ito;J. Chem. Soc. Japan, Chem. Ind. Chem.,1975
5. Sulphuric acid leaching of heavy metals from coarsely crushed manganese nodules and kinetics of leaching;Ito;J. Chem. Soc. Japan, Chem. Ind. Chem.,1977