^ 1.01.1McDonald Observatory astronomers discover Neptune-sized planet with Hobby-Eberly Telescope. University of Texas at Austin. 31 August 2004 [2007-09-04]. (原始内容于2007-02-13).
^Michael E. Brown, Emily L. Schaller. The Mass of Dwarf Planet Eris. Science. 2007-06-15, 316 (5831): 1585–1585 [2018-04-02]. ISSN 0036-8075. doi:10.1126/science.1139415. (原始内容于2021-04-17) (英语).
^How do we know the density of some extrasolar planets?. Curious About Astronomy?. [2007-09-08]. (原始内容于2007-10-12).
^Han, Inwoo; Black, David C.; Gatewood, George. Preliminary Astrometric Masses for Proposed Extrasolar Planetary Companions. The Astrophysical Journal Letters. 2001, 548 (1): L57–L60 [2012-04-08]. Bibcode:2001ApJ...548L..57H. doi:10.1086/318927. (原始内容存档于2009-04-29).