Publications
Keller, H.U., Delamere, W.A., Huebner, W.F., Reitsema, H.J., Schmidt, H.U., Whipple, F.L., Wilhelm, K., Curdt, W., Kramm, J.R., Thomas, N., Arpigny, C., Barbieri, C., Bonnet, R.M., Cazes, S., Coradini, M., Cosmovici, C.B., Hughes, D.W., Jamar, C., Malaise, D., Schmidt, K., Schmidt, W.K.H., and Seige, P. (1987) Comet P/Halley's nucleus and its activity, Astron. Astrophys. 187 807-823
Thomas, N. and Keller, H.U. (1987) Fine dust structures in the emission of comet P/Halley observed by the Halley Multicolour Camera. Astron. Astrophys. 187 843-846
Keller, H.U., Kramm, J.R. and Thomas, N. (1988) Surface features on the nucleus of comet Halley. Nature 331 227-231
Keller, H.U. and Thomas, N. (1988) On the rotation axis of comet Halley. Nature 333 146-148
Thomas, N. and Keller, H.U. (1989) The colour of comet P/Halley's nucleus and dust. Astron. Astrophys. 213 487-494
Keller, H.U. and Thomas, N. (1989) Evidence for near-surface breezes on comet P/Halley. Astron. Astrophys. 226 L9-12
Keller, H.U., Marconi, M.L. and Thomas, N. (1990) Hydrodynamic implications of particle fragmentation near cometary nuclei. Astron. Astrophys. 227 L1-L4
Thomas, N. and Keller, H.U. (1990) Photometric calibration of the Halley Multicolour Camera. Applied Optics. 29 1503-1519.
Thomas, N. and Keller, H.U. (1990) Interpretation of the inner coma observations of comet P/Halley by the Halley Multicolour Camera. Annales Geophysicae. 8 147-168.
Thomas, N. and Keller, H.U. (1991) Comet P/Halley's dust production rate at the time of Giotto encounter derived from Halley Multicolour Camera observations. Astron. Astrophys. 249 258-268.
Keller, H.U., Curdt, W., Kramm, J.R., and Thomas, N. (1996) "Atlas of comet Halley" ESA-SP 1127 volume 1.
Keller, H.U. Britt, D., Buratti, B.J., and Thomas, N. (2005) In situ observations of cometary nuclei. In Comets II. Ed. Festou, M.C., Keller, H.U. and Weaver, H.A., pp. 211-222, Pub. Univ. Arizona Press.
