@article{DOI_HOEPFNER04_JGR,
   author = "M. H{\"o}pfner and T. von Clarmann and H. Fischer and N. Glatthor 
             and U. Grabowski and S. Kellmann and M. Kiefer and A. Linden and 
             G. {Mengistu Tsidu} and M. Milz and T. Steck and G. P. Stiller and 
             D.-Y. Wang and B. Funke",
   title  = "First spaceborne observations of {A}ntarctic stratospheric 
             {ClONO$_2$} recovery: Austral spring 2002",
   journal= "J. Geophys. Res.",
   volume = "109",
   number = "D11",
   doi    = "10.1029/2004JD004609",
   eid    = "D11308",
   year   = "2004"   }