Mohajeri, Massoumeh, et al. “Therodynamic Studies on Complexation of Cu2+, Ag+ and Tl+ Metal Cations With 4?,,4?,(5?)-Ditert-Butyldibenzyl-18-Crown-6 in Acetonitrile- Dimethylformamide Binary Solutions”. Asian Journal of Chemistry, vol. 20, no. 8, Mar. 2010, pp. 6163-70, https://asianpubs.org/index.php/ajchem/article/view/12965.