Marsch, E. MPI for Aeronomy, Max Planck Institute for Solar System Research, Max Planck Society; Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;
Marsch, E., Ao, X.-Z., & Tu, C.-Y. (2004). On the temperature anisotropy of the core part of the proton velocity distribution function in the solar wind. Journal Geophysical Research, 109: A04102. doi:10.1029/2003JA010330.