@phdthesis{75646,
  author = {R. Menard and Y. Yang and Y. Rochon},
  title = {Convergence and stability of estimated error variances derived from assimilation residuals in observation space},
  year = {2009},
  journal = {ECMWF Workshop on Diagnostics of data assimilation system performance, 15 - 17 June 2009},
  pages = {133-143},
  month = {2009},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}