1. and 1929 Avhandlinger utgitt av det Norske Videnskaps-Akademi i Oslo I. Matem-Naturvid Klasse Oslo 7.
2. , , and 1933 Physikalische Hydrodynamik, Berlin, p. 523.
3. The dynamics of cyclones and anticyclones regarded as atmospheric vortices
4. Some problems associated with the stability of the westerlies