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Edgar, BC.  1972.  The Structure of the Magnetosphere as deduced from Magnetospherically Reflected Whistlers.
Fraser-Smith, A  C, Helliwell RA.  1980.  Stimulation of Pc 1 geomagnetic pulsations by naturally occurring repetitive VLF activity. Geophysical Research Letters. 7:851-853.
Stiles, G  S, Helliwell RA.  1977.  Stimulated growth of coherent VLF waves in the magnetosphere. Journal of Geophysical Research. 82:523-530.
Bell, TF, Helliwell RA.  1978.  The Stanford University VLF wave injection experiment on the ISEE-A spacecraft. IEEE Transactions on Geoscience Electronics. 16:248-252.
Fraser-Smith, A  C, Helliwell RA.  1985.  The Stanford University ELF/VLF radiometer project Measurement of the global distribution of ELF/VLF electromagnetic noise. International Symposium on Electromagnetic Compatibility. :305-311.
Helliwell, RA.  1986.  SPR: The next two years. EOS. 67(43):810-811.
de Sa, LAD.  1989.  Spectral Structure and Generation Mechanism of Ducted VLF Whistler Mode Sideband Waves.
Dunckel, N, Helliwell RA.  1977.  Spacecraft observations of man-made whistler-mode signals near the electron gyrofrequency. Radio Science. 12:821-829.
Carlson, C  R, Helliwell RA, Inan US.  1990.  Space-time evolution of whistler mode wavegrowth in the magnetosphere. Journal of Geophysical Research. 95:15073-15089.
Helliwell, RA, Chang D  C  D.  1978.  Siple/Roberval magnetospheric wave-wave interaction experiments. Antarctic Journal. XIII(4):202.
Mielke, TA, Helliwell RA.  1993.  Siple Station, Antarctica, experiments on staircase frequency ramps as approximations to continuous ramps. Journal of Geophysical Research. 98:4053-4061.
Helliwell, RA.  1979.  Siple station experiments on wave-particle interactions in the magnetosphere. Wave instabilities in space plasmas; Proceedings of the Symposium, Helsinki, Finland, July 31-August 8, 1978. (A80-21196 07-46) Dordrecht, D. Reidel Publishing Co., 1979, p. 191-203.. :191-203.
Bell, TF, Inan US, Helliwell RA, Scudder J  D.  2000.  Simultaneous triggered VLF emissions and energetic electron distributions observed on POLAR with PWI and HYDRA. Geophysical Research Letters. 27:165-168.
Sonwalkar, VS, Inan US, Bell TF, Helliwell RA, Chmyrev V  M, Sobolev Y  P, Ovcharenko O  Y, Selegej V.  1994.  Simultaneous observations of VLF ground transmitter signals on the DE 1 and COSMOS 1809 satellites: Detection of a magnetospheric caustic and a duct. Journal of Geophysical Research. 99:17511-17522.
Carlson, CR.  1987.  Simulation and Modeling of Whistler Mode Wave Growth through Cyclotron Resonance with Energetic Electrons in the Magnetosphere.
Chang, D  C  D, Helliwell RA, Bell TF.  1980.  Side-band mutual interactions in the magnetosphere. Journal of Geophysical Research. 85:1703-1712.
Henderson, T  R, Sonwalkar VS, Helliwell RA, Inan US, Fraser-Smith A  C.  1993.  A search for ELF/VLF emissions induced by earthquakes as observed in the ionosphere by the DE 2 satellite. Journal of Geophysical Research. 98:9503-9514.
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Helliwell, RA.  1995.  The role of the Gendrin mode of VLF propagation in the generation of magnetospheric emissions. Geophysical Research Letters. 22:2095-2098.
Imhof, W  L, Gaines E  E, Voss H  D, Reagan J  B, Datlowe D  W, Mobilia J, Helliwell RA, Inan US, Katsufrakis J  P, Joiner R  G.  1985.  Results from the SEEP active space plasma experiment - Effects onthe ionosphere. Radio Science. 20:511-518.
Helliwell, RA.  1965.  Rept. of the Chairman of Commission IV (Radio Noise of Terrestrial Origin). Progress in Radio Science 1960-63.
Helliwell, RA, Crystal T  L.  1975.  Reply. Journal of Geophysical Research. 80:4399-4400.
Helliwell, RA, Inan US, Katsufrakis J  P, Carpenter DL, Paschal EW.  1985.  Recent research on magnetospheric wave-particle interactions. National Institute Polar Research Memoirs. 38:83-98.
Helliwell, RA, Mielke TA, Inan US.  1990.  Rapid whistler-mode wave growth resulting from frequency-time curvature. Geophysical Research Letters. 17:599-602.
Q
Raghuram, R, Bell TF, Helliwell RA, Katsufrakis J  P.  1977.  A quiet band produced by VLF transmitter signals in the magnetosphere. Geophysical Research Letters. 4:199-202.
Ho, D.  1974.  Quasi-Periodic (QP) VLF Emissions in the Magnetosphere.