@article{KHOSRAWI13_ACP,
   author = "F. Khosrawi and R. M{\"u}ller and J. Urban and M. H. Proffitt and
             G. Stiller and M. Kiefer and S. Lossow and D. Kinnison and
             F. Olschewski and M. Riese and D. Murtagh",
   title  = "Assessment of the interannual variability and influence of the
             {QBO} and upwelling on tracer-tracer distributions of {N}$_2${O}
             and {O}$_3$ in the tropical lower stratosphere",
   journal= "Atmos. Chem. Phys.",
   volume = "13",
   number = "7",
   pages  = "3619-3641",
   doi    = "10.5194/acp-13-3619-2013",
   year   = "2013"   }