Tandon, S. P., Bhutra, M. P., & Gupta, A. (1). Absorption spectra of ternary complexes of rare earths. Rev. Téc. Fac. Ing. Univ. Zulia, 7(2). Recuperado a partir de https://mail.produccioncientificaluz.org/index.php/tecnica/article/view/5125