1. A’Hearn, M. F., Millis, R. L., Schleicher, D. G., Osip, D. J., and Birch, P. V. (1995). The ensemble properties of comets: Results from narrowband photometry of 85 comets, 1976–1992. Icarus, 118: 223–270.
2. Bockelée-Morvan, D., Moreno, R., Biver, N., Crovisier J., Crifo J.-F., Fulle M. and Grewing M. (2004). CO and dust productions in 67P/Churyumov–Gerasimenko at 3 AU post-perihelion. This volume.
3. B¨ohnhardt, H., Stüwe, J., and Schulz, R. (2003). Dust Coma and Tail Structures in Comet 67P/CG. Presentation at Capri Rosetta Workshop.
4. CARA. Cometary Archive for Amateur Astronomer, by the Italian Comet Section.
http://cara.uai.it
.
5. Divine, N. (1981). A Simple Radiation Model of Cometary Dust of P/Halley. ESA SP-174, pages 25–30.