Bünzli, Jean-Claude G.; Vuckovic, Milan M. (1983). "Spectroscopic properties of anhydrous and aqueous solutions of terbium perchlorate and nitrate: Coordination numbers of the Tb(III) ion". Inorganica Chimica Acta. 73: 53–61. doi:10.1016/S0020-1693(00)90826-0. ISSN0020-1693.
Bünzli, Jean-Claude G.; Vuckovic, Milan M. (1983). "Spectroscopic properties of anhydrous and aqueous solutions of terbium perchlorate and nitrate: Coordination numbers of the Tb(III) ion". Inorganica Chimica Acta. 73: 53–61. doi:10.1016/S0020-1693(00)90826-0. ISSN0020-1693.