Complex Formation and Liquid-Liquid Extraction in the Niobium(V) – 2,4-Dihydroxythiophenol– Hydrophobic Amines System. Pakistan Journal of Analytical & Environmental Chemistry, Pakistan, v. 16, n. 2, p. 19–27, 2015. DOI: 10.21743/. Disponível em: https://pjaec.pk/index.php/pjaec/article/view/286. Acesso em: 6 nov. 2025.