Reactive nitrogen and its correlation with ozone in the lower stratosphere and upper tropospere
Murphy, D., D. Fahey, M. Proffitt, S.C. Liu, R. Chan, C.S. Eubank, S.R. Kawa, and K. Kelly (1993), Reactive nitrogen and its correlation with ozone in the lower stratosphere and upper tropospere, J. Geophys, Res., 98, 8751-8773.