S. Vogt, Nader Haghighipour, Stefano Meschiari (2010). "The Lick-CarnegieExoplanetSurvey: A Uranus-mass Fourth Planet for GJ 876 in an Extrasolar Laplace
1088/0004-637X/748/2/93. ^ Rivera, Eugenio J. (July 2010). “The Lick-CarnegieExoplanetSurvey: A Uranus-mass Fourth Planet for GJ 876 in an Extrasolar Laplace
.975J. doi:10.1088/0004-637X/704/2/975. ^ a b c d e f The Lick–Carnegieexoplanetsurvey: Gliese 687 b: A Neptune-mass planet orbiting a nearby red dwarf