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Journal Article
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, Chang D  C  D.  1978.  Siple/Roberval magnetospheric wave-wave interaction experiments. Antarctic Journal. XIII(4):202.
Bell, TF, Inan US, Haque N, Pickett J  S.  2009.  Source regions of banded chorus. Geophysical Research Letters. 36:11101.
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.
Dunckel, N, Helliwell RA.  1977.  Spacecraft observations of man-made whistler-mode signals near the electron gyrofrequency. Radio Science. 12:821-829.
Haque, N, Inan US, Bell TF, Pickett JS.  2012.  Spatial dependence of banded chorus intensity near the magnetic equator. Geophysical Research Letters. 39(17)
Helliwell, RA.  1986.  SPR: The next two years. EOS. 67(43):810-811.
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.
Stiles, G  S, Helliwell RA.  1977.  Stimulated growth of coherent VLF waves in the magnetosphere. Journal of Geophysical Research. 82:523-530.
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.
Sa, L  A  D, Helliwell RA.  1988.  Structure of VLF whistler mode sideband waves in the magnetosphere. Journal of Geophysical Research. 93:1987-1992.
Haldoupis, C, Neubert T, Inan US, Mika A, Allin T  H, Marshall RA.  2004.  Subionospheric early VLF signal perturbations observed in one-to-one association with sprites. Journal of Geophysical Research (Space Physics). 109:10303.
Mika, A, Haldoupis C, Marshall RA, Neubert T, Inan US.  2005.  Subionospheric VLF signatures and their association with sprites observed during EuroSprite-2003. Journal of Atmospheric and Solar-Terrestrial Physics. 67:1580-1597.
Inan, US, Carpenter DL, Helliwell RA, Katsufrakis J  P.  1985.  Subionospheric VLF/LF phase perturbations produced by lightning-whistler induced particle precipitation. Journal of Geophysical Research. 90:7457-7469.
Helliwell, RA.  1960.  Summary of research on whistlers and related phenomena. J. Res. NBS. 64D(6):642.
Inan, US, Helliwell RA, Kurth W  S.  1983.  Terrestrial versus Jovian VLF chorus - A comparative study. Journal of Geophysical Research. 88:6171-6180.
Harid, V, Gołkowski M, Bell T, Inan US.  2014.  Theoretical and numerical analysis of radiation belt electron precipitation by coherent whistler mode waves. Journal of Geophysical Research: Space Physics. :n/a-n/a.
Helliwell, RA.  1967.  A Theory of Discrete VLF Emissions from the Magnetosphere. Journal of Geophysical Research. 72:4773.
Smith, R  L, Helliwell RA, Yabroff I  W.  1960.  A Theory of Trapping of Whistlers in Field-Aligned Columns of Enhanced Ionization. Journal of Geophysical Research. 65:815.
Morrill, J  S, Bucsela E  J, Pasko V  P, Berg S  L, Heavner M  J, Moudry D  R, Benesch W  M, Wescott E  M, Sentman D  D.  1998.  Time resolved N2 triplet state vibrational populations and emissions associated with red sprites. Journal of Atmospheric and Solar-Terrestrial Physics. 60:811-829.
Helliwell, RA.  2000.  Triggering of whistler mode emissions by the band-limited impulse(BLI) associated with amplified Vlf signals from Siple Station, Antarctica. Geophysical Research Letters. 27:1455.
Dunckel, N, Helliwell RA, Vesecky J.  1972.  Type III Solar Noise Observed below 100 kHz on OGO 3. I. Description of Events. Solar Physics. 25:197-209.
Helliwell, RA.  1970.  The upper atmosphere as seen from Antarctica. Bulletin of the Atomic Scientists. :55-61.
Carlson, C  R, Helliwell RA, Carpenter DL.  1985.  Variable frequency VLF signals in the magnetosphere Associated phenomena and plasma diagnostics. Journal of Geophysical Research. 90:1507-1521.
Helliwell, RA, Brice NM.  1964.  Very Low Frequency Emission Periods and Whistler Mode Group Delays. Journal of Geophysical Research. 69:4704-4708.