@phdthesis{73950,
  author = {G.J. Cats and W. Wergen},
  title = {Analysis of large scale normal modes by the ECMWF analysis scheme},
  year = {1982},
  journal = {Workshop on Current Problems in Data Assimilation, 8-10 November 1982},
  pages = {343-372},
  month = {1982},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}