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., Kjeldseth-Moe, O., Maltby, P., & Wilhelm, K. (1999). Nonlinear sunspot transition region oscillations in NOAA 8378. Astrophysical Journal, 517, L159-L162.