@manual{76415,
  author = {Adrian Simmons and R. Strüfing},
  title = {An energy and angular momentum conserving finite-difference scheme hybrid coordinates and medium range weather forecasts},
  year = {1981},
  number = {28},
  pages = {68},
  month = {11/1981},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}