1. R. B. Blackman andJ. W. Tukey,The measurement of power spectra (Dover, New York 1959).
2. J. Charney,The dynamics of long waves in a baroclinic westerly current. J. Meteorol.4 (1947), 135?167.
3. J. Charney,On the scale of atmospheric motions, Geof. Publ.17, (1948), 17.
4. J. Charney, R. Fjørtøft andJ. Von Neumann,Numerical integration of the barotropic vorticity equation, Tellus2, (1950), 237?254.
5. R. Fjørtøft, Application of integral theorems in deriving criteria of stability for laminar flows and for the baroclinic circular vortex, Geof. Publ.17, No. 6 (1951).