S. Reffert, A. Quirrenbach. Mass constraints on substellar companions candidates from the re-reduced Hipparcos intermediate astrometric data: Nine confirmed planets and two confirmed brown dwarfs. „Astronomy & Astrophysics”. 527, s. A140, 2011. DOI: 10.1051/0004-6361/201015861. arXiv:1101.2227.
S. Reffert, A. Quirrenbach. Mass constraints on substellar companions candidates from the re-reduced Hipparcos intermediate astrometric data: Nine confirmed planets and two confirmed brown dwarfs. „Astronomy & Astrophysics”. 527, s. A140, 2011. DOI: 10.1051/0004-6361/201015861. arXiv:1101.2227.
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Gamma1 Leonis b w serwisie The Extrasolar Planets Encyclopaedia (ang.)