Metal Chelates of the Amino Acid Schiff Bases: Preparation and `Spectroscopic Investigation. Journal of Pure & Applied Sciences , [S. l.], v. 16, n. 1, 2017. DOI: 10.51984/jopas.v16i1.33. Disponível em: https://sebhau.edu.ly/journal/jopas/article/view/33. Acesso em: 20 jan. 2026.