@misc{73791,
  author = {F. Bouttier and J.C. Derber and Mike Fisher},
  title = {The 1997 revision of the Jb term in 3D/4D-Var},
  year = {1997},
  journal = {ECMWF Technical Memoranda},
  number = {238},
  pages = {54},
  month = {07/1997},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  url = {https://www.ecmwf.int/node/8349},
  doi = {10.21957/s2joysbrg},
  language = {eng},
}