John Stansberry, Will Grundy, Mike Brown, Dale Cruikshank, John Spencer, David Trilling, Jean-Luc Margot, Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope, in University of Arizona, Lowell Observatory, California Institute of Technology, NASA Ames Research Center, Southwest Research Institute, Cornell University, 2007. URL consultato il 18 novembre 2008.