Keller, H. U. Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society; MPI for Aeronomy, Max Planck Institute for Solar System Research, Max Planck Society;
Knollenberg, J., Kührt, E., & Keller, H. U. (1996). Interpretation of HMC images by a combined thermal and gasdynamic model. Earth, Moon and Planets, 72, 103-112.