@misc{76075,
  author = {Florence Rabier and A. McNally and Erik Andersson and P. Courtier and P. Undén and J. Eyre and A. Hollingsworth and F. Bouttier},
  title = {The ECMWF implementation of three dimensional variational assimilation. Part II: Structure functions},
  year = {1998},
  journal = {ECMWF Technical Memoranda},
  number = {242},
  pages = {24},
  month = {01/1998},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  url = {https://www.ecmwf.int/node/11799},
  doi = {10.21957/spflvp223},
  language = {eng},
}