@phdthesis{75852,
  author = {A. O'Neill},
  title = {Scientific Objectives of SPARC and the value of data assimilation},
  year = {2004},
  journal = {ECMWF/SPARC Workshop on Modelling and Assimilation for the Stratosphere and Tropopause, 23 to 26 June 2003},
  pages = {20-26},
  month = {2004},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}