@phdthesis{76897,
  author = {H. Wernli},
  title = {Cross tropopause transport: processes and quantification based upon analyses},
  year = {2004},
  journal = {ECMWF/SPARC Workshop on Modelling and Assimilation for the Stratosphere and Tropopause, 23 to 26 June 2003},
  pages = {27-46},
  month = {2004},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}