"Darmstadtium". Periodic Table of Videos. The University of Nottingham. Retrieved 19 October 2012.  Àdàkọ:Cite Oxford Dictionaries Hoffman, Darleane C.; Lee, Diana M.; Pershina, Valeria (2006). "Transactinides and the future elements". In Morss; Edelstein, Norman M.; Fuger, Jean. The Chemistry of the Actinide and Transactinide Elements (3rd ed.). Dordrecht, The Netherlands. ISBN 978-1-4020-3555-5.  Àṣìṣe ìtọ́kasí: Invalid <ref> tag; no text was provided for refs named BFricke