@article{FUNKE05_ANTARC, author = "B. Funke and M. L{\'o}pez-Puertas and S. Gil-L{\'o}pez and T. von Clarmann and G. P. Stiller and H. Fischer and S. Kellmann", title = "Downward transport of upper atmospheric {NO}$_x$ into the polar stratosphere and lower mesosphere during the {A}ntarctic 2003 and {A}rctic 2002/2003 winters", journal= "J. Geophys. Res.", volume = "110", eid = "D24308", doi = "10.1029/2005JD006463", year = "2005" }