Sonmez, Mehmet, and M. Emin Haciyusufoglu. “Synthesis and Characterization of Cu(II), Co(II), Ni(II) and Zn(II) Schiff Base Complexes Derived from Acetylacetone With 1-Amino-5-Benzoyl-4-Phenyl-1H Pyrimidine-2-One”. Asian Journal of Chemistry, vol. 18, no. 3, Mar. 2010, pp. 2032-6, https://asianpubs.org/index.php/ajchem/article/view/20941.