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Reffert, Sabine; Bergmann, Christoph; Quirrenbach, Andreas; Trifonov, Trifon; Künstler, Andreas. Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity (англ.) // Astronomy and Astrophysics : journal. — 2015. — Vol. 574. — P. A116. — doi:10.1051/0004-6361/201322360. — Bibcode:2015A&A...574A.116R. — arXiv:1412.4634.
Wittkowski, M.; Hummel, C. A.; Aufdenberg, J. P.; Roccatagliata, V. (Декабрь 2006), Tests of stellar model atmospheres by optical interferometry. III. NPOI and VINCI interferometry of the M0 giant γ Sagittae covering 0.5-2.2 μm, Astronomy and Astrophysics, 460 (3): 843—853, arXiv:astro-ph/0610149, Bibcode:2006A&A...460..843W, doi:10.1051/0004-6361:20065853.