Stern, S. A.; Mutchler, M. J.; Weaver, H. A.; Steffl, A. J. (2006). „The Positions, Colors, and Photometric Variability of Pluto's Small Satellites from HST Observations 2005–2006”. Astronomical Journal. 132 (3): submitted. Bibcode:2006AJ....132.1405S. arXiv:astro-ph/0607507. doi:10.1086/506347. (Final preprint)
Stern, S. A.; Mutchler, M. J.; Weaver, H. A.; Steffl, A. J. (2006). „The Positions, Colors, and Photometric Variability of Pluto's Small Satellites from HST Observations 2005–2006”. Astronomical Journal. 132 (3): submitted. Bibcode:2006AJ....132.1405S. arXiv:astro-ph/0607507. doi:10.1086/506347. (Final preprint)
Stern, S. A.; Mutchler, M. J.; Weaver, H. A.; Steffl, A. J. (2006). „The Positions, Colors, and Photometric Variability of Pluto's Small Satellites from HST Observations 2005–2006”. Astronomical Journal. 132 (3): submitted. Bibcode:2006AJ....132.1405S. arXiv:astro-ph/0607507. doi:10.1086/506347. (Final preprint)