Thornton, B. F., Toohey, D. W., Avallone, L. M., Hallar, A. G., Harder, H., Martinez, M., Simpas, J. B., Brune, W. H., Koike,
M., Kondo, Y., Takegawa, N., Anderson, B. E., & Avery, M. A. (2005). Variability
of active chlorine in the lowermost Arctic stratosphere. Journal of Geophysical Research,
110:. doi:10.1029/2004JD005580.