1. Separation and recovery of nickel and copper from a laterite ammonia leach solution by liquid ion exchange;Merigold,1974
2. Processing of ocean nodules;Agarwal,1976
3. Solvent extraction of nickel and copper from laterite — ammoniacal leach liquors;Nilson;U.S. Bur. Mines, RI 8605,1982
4. Recovery of copper, nickel and cobalt from ammoniacal leach liquors obtained by direct ammonia leaching of sea nodules;Kumar;Trans. Indian Inst. Met.,1987
5. Electrowinning of nickel and cobalt from the leach liquors of domestic lateritic ores;Mussler;U.S. Bur. Mines, RI 8604,1982