Keller, H. U., Küppers, M., Fornasier, S., Gutiérrez, P. J., Hviid, S. F., Jorda, L., et al. (2007). Observations of Comet 9P/Tempel 1 around the Deep Impact event by the OSIRIS cameras onboard Rosetta. Icarus, 187, 87-103. doi:10.1016/j.icarus.2006.09.023.