Narain, Gopal, Mahesh K. Verma, and Jai Kumar Jain. 2010. “Characterisation and Electron Paramagnetic Resonance Spectra of Some Copper(II) Complexes Derived from Heterocyclic Ligand 5,5&Acute; -Diethyl-2,4,6(1H)-Pyrimidinetrione and Amines ”. Asian Journal of Chemistry 4 (4):675-79. https://asianpubs.org/index.php/ajchem/article/view/25131.