1. http://www.itl.nist.gov/dıv898/handbook/eda/section3/eda3674.htm.
2. http://www.itl.nist.gov/dıv898/handbook/eda/section3/eda35f.htm.
3. Solvent-extraction of nickel(II) by combinations of aliphatic diamines and carboxylic acids;Aggott;Journal of Inorganic and Nuclear Chemistry,1981
4. Extraction of Cr(VI) with aliquat 336 in hollow fiber contactors: mass transfer analysis and modeling;Alonso;Hydrometallurgy,1994
5. Solvent extraction as an enabling technology in the nickel industry;Bacon;Journal of the South African Institute of Mining and Metallurgy,2002