V.KIRAN KUMAR; M. RAMESWARA RAO; K. B. CHANDRA SEKHAR; N. DEVANNA. Direct and Derivative Spectrophotometric Determination of Copper(II) and Nickel(II) in Beer, Wine and Edible Oils. International Journal of Pharma and Bio Sciences, [S. l.], v. 1, n. 2, p. 1–8, 2010. Disponível em: https://ijpbs.net/index.php/journal/article/view/229. Acesso em: 23 jul. 2026.