@misc{73948,
  author = {G.J. Cats},
  title = {A method for solving a system of linear equations efficiently in order to optimise the analysis code: Operational implementation},
  year = {1981},
  journal = {ECMWF Technical Memoranda},
  number = {33},
  pages = {15},
  month = {06/1981},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  url = {https://www.ecmwf.int/node/8613},
  doi = {10.21957/97884wgx4},
  language = {eng},
}