Marcy, Geoffrey W. et al.: A Planetary Companion to the Nearby M4 Dwarf, Gliese 876. arxiv:astro-ph/9807307.
Delfosse, X. et al.: The closest extrasolar planet: A giant planet around the M4 dwarf Gl 876. arxiv:astro-ph/9808026.
Rivera, Eugenio J. et al.: The Lick-Carnegie Exoplanet Survey: A Uranus-mass Fourth Planet for GJ 876 in an Extrasolar Laplace Configuration. arxiv:1006.4244.