@manual{76616,
  author = {C. Temperton},
  title = {An improved algorithm for the direct solution of Poisson's equation over irregular regions},
  year = {1977},
  number = {5},
  pages = {19},
  month = {02/1977},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}