@phdthesis{76867,
  author = {A.T. Weaver and S. Ricci},
  title = {Constructing a background-error correlation model using generalized diffusion operators},
  year = {2003},
  journal = {Seminar on Recent developments in data assimilation for atmosphere and ocean, 8-12 September 2003},
  pages = {327-340},
  month = {2003},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}