Schaller, E.L.; Brown, M.E.. (2007-04-10). «Volatile Loss and Retention on Kuiper Belt Objects» The Astrophysical Journal 659 (1): L61–L64. doi:10.1086/516709. Bibcode: 2007ApJ...659L..61S..
Schaller, E.L.; Brown, M.E.. (2007-04-10). «Volatile Loss and Retention on Kuiper Belt Objects» The Astrophysical Journal 659 (1): L61–L64. doi:10.1086/516709. Bibcode: 2007ApJ...659L..61S..