@article{MUELLER08_SC_ACP,
   author = "S. C. M{\"u}ller and N. K{\"a}mpfer and D. G. Feist and
             A. Haefele and M. Milz and  N. Sitnikov and C. Schiller
             and C. Kiemle and J. Urban",
   title  = "Validation of stratospheric water vapour measurements from
             the airborne microwave radiometer {AMSOS}",
   journal= "Atmos. Chem. Phys.",
   volume = "8",
   pages  = "3169-3183",
   year   = "2008"   }