@phdthesis{74971,
  author = {L. Isaksen and Mike Fisher and J. Berner},
  title = {Use of analysis ensembles in estimating flow-dependent background error variance},
  year = {2007},
  journal = {ECMWF Workshop on Flow-dependent aspecyts of data assimilation, 11-13 June 2007},
  pages = {65-86},
  month = {2007},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}