ROUNAGHI, G.H., and S. HEYDARI. 2010. “Study of Complex Formation Between Dicyclohexyl-18- Crown-6 With La3+, UO22+, Ag+ and NH4+ Cations in Acetonitrile-Nitromethane Binary Mixtures”. Asian Journal of Chemistry 20 (1):535-42. https://asianpubs.org/index.php/ajchem/article/view/19453.