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2010
Carlson, BE, Lehtinen NG, Inan US.  2010.  Neutron production in terrestrial gamma ray flashes. Journal of Geophysical Research (Space Physics). 115
2009
Lehtinen, NG, Inan US.  2009.  Full-wave modeling of transionospheric propagation of VLF waves. Geophysical Research Letters. 36:3104.
Parrot, M, Inan US, Lehtinen NG, Pin\c con JL.  2009.  Penetration of lightning MF signals to the upper ionosphere over VLF ground-based transmitters. Journal of Geophysical Research (Space Physics). 114:12318.
Carlson, BE, Lehtinen NG, Inan US.  2009.  Terrestrial gamma ray flash production by lightning current pulses. Journal of Geophysical Research (Space Physics). 114
2008
Piddyachiy, D, Inan US, Bell TF, Lehtinen NG, Parrot M.  2008.  DEMETER observations of an intense upgoing column of ELF/VLF radiation excited by the HAARP HF heater. Journal of Geophysical Research (Space Physics). 113:10308.
Carlson, BE, Lehtinen NG, Inan US.  2008.  Runaway relativistic electron avalanche seeding in the Earth's atmosphere. Journal of Geophysical Research (Space Physics). 113:10307.
Parrot, M, Inan US, Lehtinen NG.  2008.  V-shaped VLF streaks recorded on DEMETER above powerful thunderstorms. Journal of Geophysical Research (Space Physics). 113:10310.
Parrot, M, Inan US, Lehtinen NG, Blanc E, Pin\c con JL.  2008.  HF signatures of powerful lightning recorded on DEMETER. Journal of Geophysical Research (Space Physics). 113:11321.
Lehtinen, NG, Inan US.  2008.  Radiation of ELF/VLF waves by harmonically varying currents into a stratified ionosphere with application to radiation by a modulated electrojet. Journal of Geophysical Research (Space Physics). 113:6301.
2007
Carlson, BE, Lehtinen NG, Inan US.  2007.  Constraints on terrestrial gamma ray flash production from satellite observation. Geophysical Research Letters. 34:8809.
Inan, US, Lehtinen NG, Moore RC, Hurley K, Boggs S, Smith DM, Fishman GJ.  2007.  Massive disturbance of the daytime lower ionosphere by the giant {$\gamma$}-ray flare from magnetar SGR 1806-20. Geophysical Research Letters. 34:8103.
Lehtinen, NG, Inan US.  2007.  Possible persistent ionization caused by giant blue jets. Geophysical Research Letters. 34:8804.
2005
Inan, US, Lehtinen NG.  2005.  Production of terrestrial gamma-ray flashes by an electromagneticpulse from a lightning return stroke. Geophysical Research Letters. 32:19818.
2001
Lehtinen, NG, Inan US, Bell TF.  2001.  Effects of thunderstorm-driven runaway electrons in the conjugatehemisphere: Purple sprites, ionization enhancements, and gamma rays. Journal of Geophysical Research. 106:28841-28856.
2000
Lehtinen, NG, Inan US, Bell TF.  2000.  Trapped energetic electron curtains produced by thunderstorm driven relativistic runaway electrons. Geophysical Research Letters. 27:1095.
Lehtinen, NG.  2000.  Relativistic Runaway Electrons Above Thunderstorms.
1999
Inan, US, Lehtinen NG, Lev-Tov S  J, Johnson M  P, Bell TF, Hurley K.  1999.  Ionization of the lower ionosphere by {$\gamma$}-rays from a magnetar: Detection of a low energy (3-10 keV) component. Geophysical Research Letters. 26:3357-3360.
Lehtinen, NG, Bell TF, Inan US.  1999.  Monte Carlo simulation of runaway MeV electron breakdown with application to red sprites and terrestrial gamma ray flashes. Journal of Geophysical Research. 104:24699-24712.
1997
Lehtinen, NG, Bell TF, Pasko V  P, Inan US.  1997.  A two-dimensional model of runaway electron beams driven by quasi-electrostatic thundercloud fields. Geophysical Research Letters. 24:2639-2642.
1996
Lehtinen, NG, Walt M, Inan US, Bell TF, Pasko V  P.  1996.  {$\gamma$}-ray emission produced by a relativistic beam of runaway electrons accelerated by quasi-electrostatic thundercloud fields. Geophysical Research Letters. 23:2645-2648.