@phdthesis{76777,
  author = {P. Undén},
  title = {Tropical data assimilation and analysis of divergence},
  year = {1988},
  journal = {Seminar on Data Assimilation and the Use of Satellite Data, 5-9 September 1988},
  volume = {I},
  pages = {151-192},
  month = {1988},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}