@article{MOREIRA15_ACP,
   author = "L. Moreira and K. Hocke and E. Eckert and T. von Clarmann
             and N. K{\"a}mpfer",
   title  = "Trend analysis of the 20-year time series of stratospheric
             ozone profiles observed by the {GROMOS} microwave radiometer
             at {B}ern",
   journal= "Atmos. Chem. Phys.",
   volume = "15",
   number = "19",
   pages  = "10999-11009",
   year   = "2015"   }