@manual{73422,
  author = {J.H. Andersen},
  title = {A routine for normal mode initialization with non-linear correction for a multi-level spectral model with triangular truncation},
  year = {1977},
  number = {15},
  pages = {42},
  month = {08/1977},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}