Schlegel, K. MPI for Aeronomy, Max Planck Institute for Solar System Research, Max Planck Society;
Link (beliebiger Volltext)
Jackel, B. J., Moorcroft, D. R., & Schlegel, K. (1997). Characteristics of very large aspect angle E-region coherent echoes at 933 MHz. Annales Geophysicae, 15(1), 54-62.