HOSSEIN ROUNAGHI, GHOLAM, and NOORANI GAMIL GEREY. “Solvent Influence Upon Complex Formation Between Dibenzo-18-Crown-6 and Cd2+, Cu2+, Tl+ and Zn2+ Cations in Dimethylsulfoxide-Methanol Binary Mixtures”. Asian Journal of Chemistry, vol. 19, no. 2, Mar. 2010, pp. 929-36, https://asianpubs.org/index.php/ajchem/article/view/20129.