NIEMIEC, P. The electronic structure of phosphotungstic (H₃PW₁₂O₄₀) heteropolyacids modified by Fe²⁺ cation. Science, Technology and Innovation, [S. l.], v. 11, n. 4, p. 24–32, 2021. DOI: 10.5604/01.3001.0014.7530. Disponível em: https://journals.anstar.edu.pl/index.php/sti/article/view/295. Acesso em: 2 may. 2024.