VYAS, M. Determination of formation constant of Er (III) systems with different N, S & O donor ligands. Chemical Synthesis Letters, [S. l.], v. 1, n. 01, p. 45–47, 2024. Disponível em: https://csl.thecmrs.in/index.php/j/article/view/15. Acesso em: 21 nov. 2024.