Synthesis and Optical Properties Study of Some Metal Complexes of Poly (Vinyl Chloride)-Pyridine-4-Carbohydrazide. Al-Nahrain Journal of Science, [S. l.], v. 16, n. 2, p. 24–29, 2018. Disponível em: https://anjs.edu.iq/index.php/anjs/article/view/660. Acesso em: 9 apr. 2025.