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;
Bruno, R., Villante, U., Bavassano, B., Schwenn, R., & Mariani, F. (1986). In-situ observations of the latitudinal gradients of the solar wind parameters during 1976 and 1977. Solar Physics, 104, 431-445.