Quasiperiodic similar to 5-60 s fluctuations of VLF signals propagating in the Earth-ionosphere waveguide: A result of pulsating auroral particle precipitation? - Carpenter, DL; Galand, M; Bell, TF; Sonwalkar, VS; Inan, US; LaBelle, J; Smith, AJ; Clark, TDG; Rosenberg, TJ (JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1997)