Gambar kapal udara dirigible (1885) La France Renard dan Krebs', diambil oleh Janssen, dari observatori Meudon
↑ Oxford English Dictionary (1989), s.v. "helium". Retrieved December 16, 2006, from Oxford English Dictionary Online. Also, from quotation there: Thomson, W. (1872). Rep. Brit. Assoc. xcix: "Frankland and Lockyer find the yellow prominences to give a very decided bright line not far from D, but hitherto not identified with any terrestrial flame. It seems to indicate a new substance, which they propose to call Helium."
↑ For the name "helium" see also Jensen, William B. (2004). "Why Helium Ends in "ium"". Journal of Chemical Education. 81 (7): 944. (subscription required for full access)
