@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"   }