NASA - National Aeronautics and Space Administration

Liu, S. C., H. Yu, B. Ridley, Y. Wang, D. D. Davis, Y. Kondo, M. Koike, B. E. Anderson, G. Sachse, G. L. Gregory, H. Fuelburg, A. M. Thompson, and H. Singh (1999), Sources of reactive nitrogen in the upper troposphere during SONEX, Geophys. Res. Lett., 26, 2441-2444.