1. The role of nickel in modern technology;Schade,1988
2. Energy constraints in the extraction of nickel from oxide ores (i);Roorda;Erzmetall,1981
3. Energy constraints in the extraction of nickel from oxide ores (ii);Roorda;Erzmetall,1981
4. Recent advances in hydrometallurgy with implications for the developing countries;Scott,1976
5. Recovery of nickel from its ores;Queneau;J. Metals,1970