Chemical Elements Discovered at Lawrence Berkeley National Laboratory [online]. Lbl.gov, 1999-06-07, [cit. 2011-02-21]. Dostupné online. Archivované 2013-01-12 z originálu.
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Chemical Elements Discovered at Lawrence Berkeley National Laboratory [online]. Lbl.gov, 1999-06-07, [cit. 2011-02-21]. Dostupné online. Archivované 2013-01-12 z originálu.