1. Extraction of Ni, Co and Cu from ocean manganese nodules with mixed solutions of ammonium carbonate and ammonium sulfite;Rokukawa;Journal of the Mining and Mineral Processing Institute of Japan,1990
2. Precipitation of Fe and Mn from ammoniacal ammonium sulphate solutions obtained from Indian Ocean manganese nodules;Nathsarma;Erzmetall,1989
3. Bacterial leaching of manganese nodules;Nakazawa;Journal of the Mining and Mineral Processing Institute of Japan,1989
4. Leaching of manganese nodules at elevated temperatures in the presence of oxygen;Anand;Hydrometallurgy,1988
5. Extraction of metals from manganese nodules of the Indian Ocean by leaching in aqueous solution of SO2;Kanungo;Hydrometallurgy,1988