1. Coronal investigations with occulted spacecraft signals
2. Boehnhardt, H., Delahodde, C., Sekiguchi, T., et al. 2001, VLT Kueyen observations of ROSETTA Target Comet 46P/Wirtanen near Aphelion, A&A, submitted
3. Canonical transformations depending on a small parameter
4. Drechsel, H., Bär, A., & Boehnhardt, H. 2000, ESTEC study - Observations and modelling of large-scale dust environment in comets in preparation of the ROSETTA mission, ESTEC scientific research contract report - June 2000, Bamberg