@misc{74481,
  author = {Mike Fisher},
  title = {Development of a simplified Kalman filter},
  year = {1998},
  journal = {ECMWF Technical Memoranda},
  number = {260},
  pages = {16},
  month = {09/1998},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  url = {https://www.ecmwf.int/node/9401},
  doi = {10.21957/vz40cqca4},
  language = {eng},
}