Hayek, W., & Christlieb, N. (2009). The Hamburg/ESO R-process enhanced star survey (HERES): IV. detailed abundance analysis and age dating of the strongly r-process enhanced stars CS 29491-069 and HE 1219-0312. Astronomy and astrophysics, 504(2), . https://doi.org/10.1051/0004-6361/200811121
Chicago Style (17th ed.) CitationHayek, Wolfgang, and Norbert Christlieb. "The Hamburg/ESO R-process Enhanced Star Survey (HERES): IV. Detailed Abundance Analysis and Age Dating of the Strongly R-process Enhanced Stars CS 29491-069 and HE 1219-0312." Astronomy and Astrophysics 504, no. 2 (2009). https://doi.org/10.1051/0004-6361/200811121.
MLA (9th ed.) CitationHayek, Wolfgang, and Norbert Christlieb. "The Hamburg/ESO R-process Enhanced Star Survey (HERES): IV. Detailed Abundance Analysis and Age Dating of the Strongly R-process Enhanced Stars CS 29491-069 and HE 1219-0312." Astronomy and Astrophysics, vol. 504, no. 2, 2009, https://doi.org/10.1051/0004-6361/200811121.