CHARACTERIZATION OF CERIUM OXIDE-CHITOSAN NANOCOMPOSITE–MODIFIED SCREEN PRINTED CARBON ELECTRODE AND APPLICATION IN MELATONIN DETERMINATION. International Journal of Geomate, [S. l.], v. 14, n. 42, p. 151–157, 2018. Disponível em: https://geomatejournal.com/geomate/article/view/954. Acesso em: 10 oct. 2026.