@misc{76682,
  author = {S. Tibaldi and C. Brankovic and U. Cubasch},
  title = {30 day integrations using the operational ECMWF spectral model},
  year = {1987},
  journal = {ECMWF Technical Memoranda},
  number = {138},
  pages = {53},
  month = {09/1987},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  url = {https://www.ecmwf.int/node/12721},
  doi = {10.21957/04itu6iw},
  language = {eng},
}