Wennberg, P., R.C. Cohen, R.M. Stimpfle, J.P. Koplow, J.G. Anderson, R.J. Salawitch, D.W. Fahey, E.L. Woodbridge, E.R. Keim, R. Gao, C.R. Webster, R. May, D.W. Toohey, L.M. Avallone, . Proffitt, M. Loewenstein, J.R. Podolske, . Chan, and S. Wofsy (1994), Removal of Stratospheric O3 by Radicals: In Situ Measurements of OH, HO2, NO, NO2, ClO, and BrO, Science, 266, 398-404.