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Wako Aoki, Timothy C. Beers, Satoshi Honda, Daniela Carollo. Extreme Enhancements of r-process Elements in the Cool Metal-poor Main-sequence Star SDSS J2357–0052. „The Astrophysical Journal Letters”. 723 (2), s. L201–L206, 2010-11-10. DOI: 10.1088/2041-8205/723/2/L201. (ang.).
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E. Margaret Burbidge, G.R. Burbidge, William A. Fowler, F. Hoyle. Synthesis of the Elements in Stars. „Reviews of Modern Physics”. 29 (4), s. 547, 1957-10-01. DOI: 10.1103/RevModPhys.29.547. Bibcode: 1957RvMP...29..547B. (ang.).