Kumar, K. Ravi, et al. “Mixed Micellar Cloud Point Extraction and Spectrophotometric Determination of Iron(II) Using 1,10-Phenanthroline: Effect of Sodium Nitroprusside on Extraction Efficiency”. Asian Journal of Chemistry, vol. 31, no. 7, June 2019, pp. 1591-4, doi:10.14233/ajchem.2019.21999.