1. Comets in the Post-Halley Era, (Newburn, R.L., Neugebauer, M., Rahe, J., eds.). Dordrecht, The Netherlands: Kluver Academic Publishers (1991).
2. Symposium on the Diversity and Similarity of Comets, ESA SP-278, (Rolfe, E.J., Battrick, B., eds.) Brussels 1987.
3. 20th ESLAB Symposium on the Exploration of Halley's Comet, ESA SP-250, (Battrick, B., Rolfe, E.J., Reinhard, R., eds.) Paris 1986.
4. Halley's Comet, Astron. Astrophys. 187 (1987), Nos. 1–2 (special volume).
5. Asteroids, Comets, Meteors II (Lagerkvist, C.-I., Lindblad, B.A., Rickman, H., Lundstedt, H., eds.) Uppsala 1986.