Jaeglé, L., D.J. Jacob, W.H. Brune, I. Faloona, D. Tan, B.G. Heikes, Y. Kondo, G.W. Sachse, B.E. Anderson, G.L. Gregory, H.B. Singh, R. Pueschel, G. Ferry, D.R. Blake, and R.E. Shetter (2000), Photochemistry of HOx in the upper troposphere at northern midlatitudes, J. Geophys. Res., 105, 3877-3892.