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Reffert، Sabine؛ Bergmann، Christoph؛ Quirrenbach، Andreas؛ Trifonov، Trifon؛ Künstler، Andreas (2015). "Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity". Astronomy & Astrophysics. ج. 574: A116. arXiv:1412.4634. Bibcode:2015A&A...574A.116R. DOI:10.1051/0004-6361/201322360.