1. The Deep Impact Project
2. Andrienko, D.A., Vashchenko, V.N., 1981. Komety i korpuskularnoye izluchenye Solntsa (in Russian). Mir-Nauka, Moscow.
3. Comet 72P/Denning-Fujikawa: down but not necessarily out
4. Belton, M.F., A׳Hearn, M.J.S., Besse, S., Carcich, B., Delamere, A., Farnham, T.L., Feaga, L.M., Groussin, O., Hampton, D.L., Klaasen, K.P., Kissel, J., Li, J., Lisse, C.M., McFadden, L.A., Meech, K.J., Merlin, F., Schultz, P.H., Sunshine, J.M., Thomas, P.C., Veverka, J., Wellnitz, D.D., Yeomans, D.K., 2010. In: Proceedings of 38th COSPAR Scientific Assembly held in Bremen, Germany, 15–18 July 2010. p. 2.