NASA - National Aeronautics and Space Administration

Neuman, J. A., R. Gao, M. E. Schein, S. Ciciora, J. C. Holecek, T. Thompson, R. H. Winkler, R. McLaughlin, M. J. Northway, E. Richard, and D. Fahey (2000), A fast response chemcial ionization mass spectrometer for in situ measurements of HNO3 in the upper troposphere and lower stratosphere, Rev. Sci. Instrum., 71, 3886-3894.