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Journal Article
Duhl T.R, Helmig D., Guenther A..  2008.  Sesquiterpene emissions from vegetation: a review. Biogeosciences. 5(3):761-777.
Kim S., Karl T., Helmig D., Daly R., Rasmussen R., Guenther A..  2009.  Measurement of atmospheric sesquiterpenes by proton transfer reaction-mass spectrometry (PTR-MS). Atmospheric Measurement Techniques Discussions. 2:99-112.
Bryan A.M, Bertman S.B, Carroll M.A, Dusanter S., Edwards G.D, Forkel R., Griffith S., Guenther A.B, Hansen R.F, Helmig D. et al..  2012.  In-canopy gas-phase chemistry during CABINEX 2009: sensitivity of a 1-D canopy model to vertical mixing and isoprene chemistry. Atmospheric Chemistry and Physics. 12(18):8829-8849.
Helmig D., Seok B, Williams MW, Hueber J, Sanford R.  2009.  Fluxes and chemistry of nitrogen oxides in the Niwot Ridge, Colorado, snowpack. Biogeochemistry. 95(1):115-130.
Seok B., Helmig D., Ganzeveld L., Williams M.W, Vogel C.S.  2013.  Dynamics of nitrogen oxides and ozone above and within a mixed hardwood forest in northern Michigan. Atmospheric Chemistry and Physics. 13(15):7301-7320.
Pratt K.A, Mielke L.H, Shepson P.B, Bryan A.M, Steiner A.L, Ortega J., Daly R., Helmig D., Vogel C.S, Griffith S. et al..  2012.  Contributions of individual reactive biogenic volatile organic compounds to organic nitrates above a mixed forest. Atmospheric Chemistry and Physics. 12(21):10125-10143.
Seok B, Helmig D., Williams MW, Liptzin D, Chowanski K, Hueber J.  2009.  An automated system for continuous measurements of trace gas fluxes through snow: an evaluation of the gas diffusion method at a subalpine forest site, Niwot Ridge, Colorado. Biogeochemistry. 95(1):95-113.
Ortega J, Helmig D..  2008.  Approaches for quantifying reactive and low-volatility biogenic organic compound emissions by vegetation enclosure techniques – Part A. Chemosphere. 72(3):343-364.