References
- BURGER, A. P., 1960, First Steps in Dynamical Weather Prediction, Weather Bureau, Union of South Africa, WB25.
- ELIASSEN, A., 1949, The quasi-static equations of motion with pressure as an independent variable. Geofysiske Publikasjoner, 17 No. 3, pp. 1–44.
- PERKINS, D. T. and GUSTAFSON, A. F., 1951, Differential relations between quantities projected from meteorological surfaces. J. Meteor., 8, No. 6 pp. 418–420.