@misc{80472,
  keywords = {Symposium, 4D-Var},
  author = {M. Buehner and J.-F. Caron and Ping Du},
  title = {The big leap: Replacing 4D-Var with 4D-EnVar and life ever since},
  year = {2018},
  journal = {Symposium: 20 years of 4D-Var at ECMWF},
  month = {2018},
  language = {eng},
}