@phdthesis{76789,
  author = {S. Uppala and A. Hollingsworth and S. Tibaldi and P.W. Kållberg},
  title = {Results from two recent observing system experiments at ECMWF},
  year = {1984},
  journal = {Seminar on Data Assimilation Systems and Observing System Experiments with Particular Emphasis on FGGE, 3-7 September 1984},
  volume = {I},
  pages = {165-202},
  month = {1984},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}