C. Budtz-Jørgensen I. Kuvvetli, Y. Skogseide, K. Ullaland, N. Østgaard. Characterization fo CZT detectors fro the ASIM mission, Converence Record from IEEE, Dresden, October 2008.
S. Mikkelsen D. Meier, G. Mæhlum, B. Sundal, J. Talebi, A. Helland, N. Østgaard, Y. Skogseide, K. Ullaland. Low-Power and Low-Noise Multi Channel ASIC for X-ray and Gamma-Ray Spectrosopy, AMISCA, Cascais, Portugal, August 2008.
Østgaard, N., T. Gjesteland, J. Stadsnes, P. H. Connell, and B. Carlson (2008), Production altitude and time delays of the terrestrial gamma flashes: Revisiting the Burst and Transient Source Experiment spectra, J. Geophys. Res., 113, A02307, doi:10.1029/2007JA012618.
T. Neubert, I. Kuvvetli, C. Budtz-Jorgensen, N. Østgaard, V. Reglero, N. Arnold. The Atmosphere-Space Interactions Monitor (ASIM) for the International Space Station. Proceedings from the ILWS Goa Workshop. February 2006.
T. Gjesteland, N. Østgaard and J. Stadsnes. Monte Carlo Simulation of Terrestrial Gamma ray Flashes production altitude. EGU meeting in Vienna, April 2007.
N. Østgaard, J. Stadsnes, T. Gjesteland, Paul H. Conell. TGF production altitude - revisiting the BATSE spectra in view of upcoming missions AGU fall meeting, San Francisco, December, 2006.
N. Østgaard and J. Stadsnes. X-ray spectra measured by MXGS can reveal the production altitude of TGFs. ASIM Science workshop, ESTEC, June, 2006.
N. Østgaard and J. Stadsnes. Production altitude effects on the X-ray spectrum from TGFs. AGU fall meeting in San Francisco, 2005.
N. Østgaard and J. Stadsnes. Production altitude effects on the X-ray spectrum from TGFs. Invited talk at the midterm review and science meeting of the European Union Research Training Network, Coupling of Atmopsheric Layers, Crete, Greece, June, 2005.