Semnani, Abolfazl, et al. “Spectrophotometric Study of the Complexation of Iodine and Iodine Monochloride With 1,4,7,-Trimethyl-1,4,7-Triazacyclononane in Chloroform Solution”. Asian Journal of Chemistry, vol. 18, no. 3, Mar. 2010, pp. 1759-65, https://asianpubs.org/index.php/ajchem/article/view/20874.