Yagan Asci, M. et al. 2012. Determination of Nickel, Copper and Zinc in Water Samples After Cloud Point Extraction Using Ammonium O,O-Dicyclohexyldithiophosphate and Triton X-114 by Flame Atomic Absorption Spectrometry. Asian Journal of Chemistry. 24, 6 (Feb. 2012), 2497–2502.