Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8 Joel Henry Hildebrand. Principles of Chemistry. BiblioBazaar, LLC. 2008: 191. ISBN 0-559-31877-4
互联网档案馆的存檔,存档日期2011-07-29. U. Benjamin Kaupp, Johannes Solzin, Eilo Hildebrand, Joel E. Brown, Annika Helbig, Volker Hagen, Michael Beyermann, Francesco