Schwenn, R. Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society; MPI for Aeronomy, Max Planck Institute for Solar System Research, Max Planck Society;
Neugebauer, M., Goldstein, B. E., Balsiger, H., Neubauer, F. M., Schwenn, R., & Shelley, E. G. (1989). The Density of Cometary Protons Upstream of comet Halley's Bow Shock. Journal Geophysical Research, 94, 1261-1269.