Stansberry, Grundy, Brown, Spencer, Trilling, Cruikshank, Luc Margot Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope (2007) Preprint arXiv (页面存档备份,存于互联网档案馆)
Gingerich, Owen. The Path to Defining Planets(PDF). Harvard-Smithsonian Center for Astrophysics and IAU EC Planet Definition Committee chair: 4. 2006-08-16 [2007-03-13]. (原始内容存档(PDF)于2020-10-25).
Stansberry, Grundy, Brown, Spencer, Trilling, Cruikshank, Luc Margot Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope (2007) Preprint arXiv (页面存档备份,存于互联网档案馆)
Gingerich, Owen. The Path to Defining Planets(PDF). Harvard-Smithsonian Center for Astrophysics and IAU EC Planet Definition Committee chair: 4. 2006-08-16 [2007-03-13]. (原始内容存档(PDF)于2020-10-25).