1. Metallurgy and processing of marine manganes nodules;Fuerstenau;Miner. Process. Technol. Rev.,1983
2. Manganese nodule extractive metallurgy: Review 1973–78;Hubred;Mar. Min.,1980
3. Fundamental and practical factors in ammonia leaching of nickel and cobalt ores;Caron;J. Met.,1950
4. Process for recovery of nickel, cobalt and copper from domestic laterites;Siemens,1977
5. Extractive Metallurgy of Nickel,1987