@article{HEGGLIN14_NG,
   author = "M. I. Hegglin and D. A. Plummer and T. G. Shepherd and
             J. F. Scinocca and J. Anderson and L. Froidevaux and B. Funke
             and D. Hurst and A. Rozanov and J. Urban and T. von Clarmann and
             K. A. Walker and H. J. Wang and S. Tegtmeier and K. Weigel",
   title  = "Vertical structure of stratospheric water vapour trends derived
             from merged satellite data",
   journal= "Nature Geosci.",
   volume = "7",
   pages  = "768-776",
   doi    = "10.1038/ngeo2236",
   year   = "2014"   }