Reffert S, Bergmann C, Quirrenbach A, Trifonov T, Künstler A (2015). »Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity«. Astronomy & Astrophysics. 574: 13. arXiv:1412.4634. Bibcode:2015A&A...574A.116R. doi:10.1051/0004-6361/201322360. A116.
Reffert S, Bergmann C, Quirrenbach A, Trifonov T, Künstler A (2015). »Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity«. Astronomy & Astrophysics. 574: 13. arXiv:1412.4634. Bibcode:2015A&A...574A.116R. doi:10.1051/0004-6361/201322360. A116.
Reffert S, Bergmann C, Quirrenbach A, Trifonov T, Künstler A (2015). »Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity«. Astronomy & Astrophysics. 574: 13. arXiv:1412.4634. Bibcode:2015A&A...574A.116R. doi:10.1051/0004-6361/201322360. A116.