@misc{80473,
  keywords = {Symposium, 4D-Var},
  author = {P. Courtier},
  title = {20 year of 4D-Var, the decision making process},
  year = {2018},
  journal = {Symposium: 20 years of 4D-Var at ECMWF},
  month = {2018},
  language = {eng},
}