Garrett, T. J., Heymsfield, A. J., McGill, M. J., Ridley, B. A., Baumgardner, D. G., Bui, T. P., & Webster, C. R. (2004). Convective generation of cirrus near the tropopause. Journal Of Geophysical Research-Atmospheres, 109, D21203. doi:10.1029/2004JD004952