Ern, M., Krebsbach, M., Preusse, P., Fröhlich, K., Hoffmann, P., Jacobi, C., Schmidt, T., Wickert, J. (2006): GW-CODE: Gravity wave coupling processes and their decadal variation, (Sodankylä Geophysical Observatory Reports; No. 55/2006), 4th IAGA/ICMA/CAWSES Workshop on Long-Term Changes and Trends in the Atmosphere (Sodankylä, Finland 2006).