Aircraft observations of thin cirrus clouds near the Tropical Tropopause
Pfister, L., H. Selkirk, E. Jensen, M. R. Schoeberl, B. Toon, E. Browell, W. B. Grant, B. Gary, M. J. Mahoney, T. P. Bui, and E. Hintsa (2001), Aircraft observations of thin cirrus clouds near the Tropical Tropopause, J. Geophys. Res., 106, 9765-9786.