Harikrishna, V., et al. “Spectrophotometric Determination of Propoxur and Carbosulfan With 2,4,6-Trichloroaniline As the Coupling Agent ”. Asian Journal of Chemistry, vol. 15, no. 2, Mar. 2010, pp. 1013-9, https://asianpubs.org/index.php/ajchem/article/view/21738.