Heber, B. MPI for Aeronomy, Max Planck Institute for Solar System Research, Max Planck Society;
Heber, B., Blake, J. B., Paizis, C., Bothmer, V., Kunow, H., Müller-Mellin, R., et al. (2000). Recurrent modulation of galactic cosmic ray electrons and protons: Ulysses COSPIN/KET observations. In R. A. Mewaldt, J. R. Jocipii, M. A. Lee, E. Moebius, & T. Zurbuchen (Eds.), Acceleration and Transport of Energetic Particles Observed in the Heliosphere. American Institute of Physics.