Keys, J.G. Johnston, P.V. Stratospheric NO2 and O3 in Antarctica: dynamic and chemically controlled variations. Geophysical research letters 13(12): 1260-1263, 1986.
Keys, J.G. Johnston, P.V. Stratospheric NO2 column measurements from three Antarctic sites. Geophysical research letters 15(8): 989-900, 1988.
Keys, J.G. Gardiner, B.G. NO2 overnight decay and layer height at Halley Bay, Antarctica. Geophysical research letters 18(4): 665-668, 1991.
Keys, J.G. Gardiner, B.G. Overnight decay of NO2 as observed at Halley Bay and calculated from ozone and temperature profiles. in: Proceedings of the 1st European Workshop on Polar Stratospheric Ozone Research, Schliersee, Germany, Oct.3-5, 1990.Pyle J.A. Harris N.R. (eds) Brussels: Commission of the European Communities. 1991. pp.69-72
Keys, J.G. Johnston, P.V. Blatherwick, R.D. Murcray, F.J. Evidence for heterogeneous reactions in the Antarctic autumn stratosphere. Nature 361(6407): 49-51, 1993.
Keys, J.G. Johnston, P.V. Blatherwick, R.D. Murcray, F.J. Measurements of stratospheric odd nitrogen at Arrival Heights, Antarctica, in 1991. in: Ozone in the troposphere and stratosphere; Quadrennial Ozone Symposium, Charlottesville, VA, June 4-13, 1992. Part 2.Hudson R.D. (ed) Greenbelt, MD: U.S. National Aeronautics and Space Administration. 1994. pp.610-612
Matthews, W.A. Keys, J.G. Johnston, P.V. Transport and photochemical effects seen in stratospheric NO2 amounts. Journal of atmospheric and terrestrial physics 48(11/12): 1093-1097, 1986.
Matthews, W.A. Keys, J.G. Solomon, S. DSIR?s stratospheric trace gas programme in Antarctica. in: 4th workshop, Italian Research on Antarctic Atmosphere: Porano, 21-23 October 1991.Colacino M. Giovanelli G. Stefanutti L. (eds) Bologna: Italian Physical Society. 1992. pp.311-321 ISBN 8877940484