The abundances of constituents of Titan's atmosphere from the GCMS instrument on the Huygens probeH. Niemann, S. H. Way, S. K. Atreya et al.|Nature|2005Cited by 940
Liquid water on Enceladus from observations of ammonia and 40Ar in the plumeJ. H. Waite, W.-H. Ip, William S. Lewis et al.|Nature|2009Cited by 586
Composition of Titan's lower atmosphere and simple surface volatiles as measured by the Cassini‐Huygens probe gas chromatograph mass spectrometer experimentH. Niemann, F. Raulin, S. K. Atreya et al.|Journal of Geophysical Research Atmospheres|2010Cited by 481
Mass spectrometric measurements of the neutral gas composition of the thermosphere and exosphere of VenusH. Niemann, N. W. Spencer, W. T. Kasprzak et al.|Journal of Geophysical Research Atmospheres|1980Cited by 242
Electron and molecular nitrogen temperature and density in the thermosphereN. W. Spencer, H. Niemann, L. H. Brace et al.|Journal of Geophysical Research Atmospheres|1965Cited by 135