1. Anon, Mond Nickel Co Ltd, 1953, Improvements in the recovery of nickel from solutions, (GB686221A).
2. Successive extraction and photometric determination of traces of copper, nickel, iron, and manganese;Blank;Analiticheskoi Khimii,1961
3. Metal recovery from waste sludge's Clyde Spear;Brooks,1985
4. Spectrophotometric determination of trace amounts of copper and nickel in high purity thorium compounds;Chan;Huaxue,1969
5. The determination of nickel with dimethylglyoxime in iron and steel containing cobalt and copper;Claassen;Analyst,1966