Wilhelm, K. 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;
Brynildsen, N., Maltby, P., Kjeldseth-Moe, O., & Wilhelm, K. (2004). Dual flows with supersonic velocities in the sunspot transition region. Astrophysical Journal, 612(2), 1193-1195. doi:10.1086/422838.