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Weaver, Harold F. (1947). «The Visibility of Stars Without Optical Aid». Publications of the Astronomical Society of the Pacific59 (350): 232–243. doi:10.1086/125956. Bibcode: 1947PASP...59..232W.
Bailer-Jones, C.A.L.; Rybizki, J,; Andrae, R.; Fouesnea, M. (2018). «New stellar encounters discovered in the second Gaia data release». Astronomy & Astrophysics616 (37): A37. doi:10.1051/0004-6361/201833456. Bibcode: 2018A&A...616A..37B.
Bessel, F. W. (1839). «Bestimmung der Entfernung des 61sten Sterns des Schwans. Von Herrn Geheimen - Rath und Ritter Bessel» (στα German). Astronomische Nachrichten16 (5-6): 65. doi:10.1002/asna.18390160502. Bibcode: 1839AN.....16...65B. «(page 92) Ich bin daher der Meinung, daß nur die jährliche Parallaxe = 0"3136 als das Resultat der bisherigen Beobachtungen zu betrachten ist». Παράλλαξη 313,6 mas δίνει απόσταση 10,4 ετών φωτός.
Zechmeister, M.; Kürster, M; Endl, M.; Lo Curto, G.; Hartman, H.; Nilsson, H.; Henning, T.; Hatzes, A. και άλλοι. (April 2013). «The planet search programme at the ESO CES and HARPS. IV. The search for Jupiter analogues around solar-like stars». Astronomy and Astrophysics552: pp62. doi:10.1051/0004-6361/201116551. Bibcode: 2013A&A...552A..78Z.
Rivera, Eugenio J. και άλλοι. (July 2010). «The Lick-Carnegie Exoplanet Survey: A Uranus-mass Fourth Planet for GJ 876 in an Extrasolar Laplace Configuration». The Astrophysical Journal719 (1): 890–899. doi:10.1088/0004-637X/719/1/890. Bibcode: 2010ApJ...719..890R.