@manual{73797,
  author = {C. Brankovic},
  title = {Zonal diagnostics of the ECMWF operational analyses and forecasts},
  year = {1986},
  number = {57},
  pages = {72},
  month = {10/1986},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}