@misc{81351,
  author = {Marta Janiskova and Philippe Lopez},
  title = {Linearised physics: the of ECMWF’s 4D-Var},
  year = {2023},
  journal = {ECMWF Newsletter},
  chapter = {Earth System Science},
  number = {175},
  pages = {20-26},
  month = {05/2023},
  url = { },
  doi = {10.21957/mjb5e1d9n6},
}