@misc{80197,
  keywords = {newsletter},
  author = {Y. Trémolet and Mike Fisher},
  title = {Weak constraint 4D-Var},
  year = {2010},
  journal = {ECMWF Newsletter},
  chapter = {Meteorology},
  pages = {12-16},
  month = {2010},
  publisher = {ECMWF},
  url = {https://www.ecmwf.int/node/17456},
  doi = {10.21957/21fybybt},
  language = {eng},
}