HULETT, L.G.; THORNTON, D.A. Infrared Spectra of Tetrakis(tropolonato) Lanthanide(III) Chelates: Evidence for Crystal Field Effects. CHIMIA, [S. l.], v. 26, n. 2, p. 72, 1972. DOI: 10.2533/chimia.1972.72. Disponível em: https://www.chimia.ch/chimia/article/view/1972_72. Acesso em: 4 apr. 2025.