T. Peter, B. P. Luo, H. Wernli, M. Wirth, C. Kiemle, et al.. Ultrathin Tropical Tropopause Clouds (UTTCs): I. Cloud morphology and occurrence.
Atmospheric Chemistry and Physics Discussions, European Geosciences Union, 2003, 3 (2), pp.1557-1578.
⟨hal-00300984⟩