Turler, A. (2004). "Gas Phase Chemistry of Superheavy Elements". Journal of Nuclear and Radiochemical Sciences 5 (2): R19–R25. doi:10.14494/jnrs2000.5.R19. http://wwwsoc.nii.ac.jp/jnrs/paper/JN52/j052Turler.pdf.  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: Springer Science+Business Media. ISBN 978-1-4020-3555-5.  Àṣìṣe ìtọ́kasí: Invalid <ref> tag; no text was provided for refs named BFricke Conradie, Jeanet; Ghosh, Abhik (15 June 2019). "Theoretical Search for the Highest Valence States of the Coinage Metals: Roentgenium Heptafluoride May Exist". Inorganic Chemistry 2019 (58): 8735–8738. doi:10.1021/acs.inorgchem.9b01139.