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Stern, S. Alan: The Lunar atmosphere: History, status, current problems, and context. Rev. Geophys., 1999, 37. vsk, nro 4, s. 453–491. doi:10.1029/1999RG900005. Bibcode:1999RvGeo..37..453S.
Michael T. Wieser & Tyler B. Coplen: Atomic Weights of the Elements 2009 (IUPAC technical report). Pure and Applied Chemistry, 2011, 83. vsk, nro 2. IUPAC. Artikkelin verkkoversio. Viitattu 16.4.2011. (englanniksi)