NASA - National Aeronautics and Space Administration

Minschwaner, K., A. Dessler, J. W. Elkins, C. M. Volk, D. Fahey, M. Loewenstein, J. Podolske, A. E. Roche, and R. Chan (1996), Bulk properties of isentropic mixing into the tropics in the lower stratosphere, J. Geophys. Res., 101, 9433-9439.