@misc{74482,
  author = {Mike Fisher},
  title = {Estimation of entropy reduction and degrees of freedom for signal for large variational analysis systems},
  year = {2003},
  journal = {ECMWF Technical Memoranda},
  number = {397},
  pages = {18},
  month = {01/2003},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  url = {https://www.ecmwf.int/node/9402},
  doi = {10.21957/2bec9m38o},
  language = {eng},
}