@article{STILLER08_ACP,
  author = "G. P. Stiller and T. v. Clarmann and M. H{\"o}pfner and
             N. Glatthor and U. Grabowski and S. Kellmann and A. Kleinert
             and A. Linden and M. Milz and T. Reddmann and T. Steck and
             H. Fischer and B. Funke and M. L{\'o}pez-Puertas and A. Engel",
   title  = "Global distribution of mean age of stratospheric air from
             {MIPAS SF}$_6$ measurements",
   journal= "Atmos. Chem. Phys.",
   volume = "8",
   pages  = "677-695",
   year   = "2008"   }