Sarhan, B. M., T.A. Hamdan, & B. Z. Naema.
" Synthesis and Characterization of Some mixed-Ligand  Complexes Containing N-acetyl Tryptophan and  (2, 2′-bipyridine) with Some Metal Salts." <em>Ibn AL- Haitham Journal For Pure and Applied Sciences</em> [Online], 25.3 (2012): 294-303. Web. 17 Aug. 2021