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A
Helliwell, RA.  1977.  Active Very Low Frequency Experiments on the Magnetosphere from Siple Station, Antarctica. Royal Society of London Philosophical Transactions Series B. 279:213-224.
Bernard, LC.  1973.  Amplitude Variations of Whistler-mode Signals Caused by their Interaction with Energetic Electrons of the Magnetosphere.
Helliwell, RA, Katsufrakis J  P, Trimpi M  L, Brice NM.  1964.  Artificially Stimulated Very Low Frequency Radiation from the Ionosphere. Journal of Geophysical Research. 69:2391-2394.
Mielke, TA.  1993.  Aspects of the Magnetospheric Amplification Phenomenon in Ducted Whistler-mode Waves.
Martin, L  H, Helliwell RA.  1960.  Association between Auroræ and Very Low-Frequency Hiss Observed at Byrd Station, Antarctica. Nature. 187:751-753.
Fortnam, BR.  1985.  An Automatic System for Global Monitoring of ELF and VLF Radio Noise Phenomena.
B
Burtis, W  J, Helliwell RA.  1969.  Banded chorus - A new type of VLF radiation observed in the magnetosphere by OGO 1 and OGO 3.. Journal of Geophysical Research. 74:3002-3010.
Helliwell, RA, Inan US, Katsufrakis J  P, Carpenter DL.  1986.  Beat excitation of whistler mode sidebands using the Siple VLF transmitter. Journal of Geophysical Research. 91:143-153.
Dingle, B K.  1977.  Burst Precipitation of Energetic Electrons from the Magnetosphere.
C
Gail, W  B, Inan US, Helliwell RA, Carpenter DL, Krishnaswamy S.  1990.  Characteristics of wave-particle interactions during sudden commencements. I - Ground-based observations. Journal of Geophysical Research. 95:119-137.
Lefeuvre, F, Helliwell RA.  1985.  Characterization of the sources of VLF hiss and chorus observed on Geos 1. Journal of Geophysical Research. 90:6419-6438.
Helliwell, RA.  1975.  Coherent VLF waves in the magnetosphere. Royal Society of London Philosophical Transactions Series A. 280:137-149.
Inan, US, Bell TF, Helliwell RA.  1977.  Coherent wave induced particle precipitation into the upper atmosphere. NATO ASIC Proc. 35: Dynamical and Chemical Coupling Between the Neutral and Ionized Atmosphere. :169-174.
Rosenberg, TJ, Siren J  C, Matthews D  L, Marthinsen K, Holtet J  A, Egeland A, Carpenter DL, Helliwell RA.  1981.  Conjugacy of electron microbursts and VLF chorus. Journal of Geophysical Research. 86:5819-5832.
Luette, J  P, Park CG, Helliwell RA.  1979.  The control of the magnetosphere by power line radiation. Journal of Geophysical Research. 84:2657-2660.
Helliwell, RA.  1983.  Controlled stimulation of VLF emissions from Siple Station, Antarctica. Radio Science. 18:801-814.
Helliwell, RA.  1974.  Controlled VLF Wave Injection Experiments in the Magnetosphere. Space Science Reviews. 15:781-802.
Helliwell, RA, Katsufrakis J  P.  1978.  Controlled wave-particle interaction experiments, Paper 5 in Upper Atmosphere Research in Antarctica. Upper Atmosphere Research in Antarctica. 29:100-129.
Carlson, C  R, Helliwell RA, Carpenter DL.  1985.  Correction to ``Variable Frequency VLF Signals in the Magnetosphere: Associated Phenomena and Plasma Diagnostics''. Journal of Geophysical Research. 90(A7):6689-6689.
Helliwell, RA, Doolittle J  H, Armstrong W  C, Carpenter DL, Mende SB.  1980.  Correlation between lambda 4278 optical emissions and VLF wave events observed at L approximately 4 in the Antarctic. Journal of Geophysical Research. 85:3376-3386.
Helliwell, RA.  1963.  Coupling between the ionosphere and the earth-ionosphere waveguide at very low frequencies. The Ionosphere. :452.
Chang, H-chun.  1983.  Cyclotron Resonant Scattering of Energetic Electrons by Electromagnetic Waves in the Magnetosphere.
D
Mlodnosky, R  F, Helliwell RA, Rorden L  H.  1965.  Daytime Whistler-Mode Attenuation through the Lower Ionosphere at 15.5 Kc as Measured on Explorer VI during Launch Trajectory. NASA Special Publication. 54:91.
Rastani, K, Inan US, Helliwell RA.  1985.  DE 1 observations of Siple transmitter signals and associated sidebands. Journal of Geophysical Research. 90:4128-4140.
Sonwalkar, VS, Inan US, Bell TF, Helliwell RA, Molchanov O  A, Green JL.  1994.  DE 1 VLF observations during Activny wave injection experiments. Journal of Geophysical Research. 99:6173-6189.