Kissel, J. Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society;
Sunshine, J. M., A'Hearn, M. F., Groussin, O., Li, J. Y., Belton, M. J. S., Delamere, W. A., et al. (2006). Exposed water ice deposits on the surface of comet 9P/Tempel 1. Science, 311(5766), 1453-1455. doi:10.1126/science.1123632.