1. Steffen, H. H.: Theoretical and experimental investigation of a two-dimensional centred expansion flow with heat addition. (Mitteilungen des Instituts f�r Str�mungslehre und Str�mungsmaschinen, T. H. Karlsruhe, No. 6) June 1967, p. 40, RAE Library Translation 1331.
2. K�chemann, D.: Some general aspects of the interactions between the means of propulsion and lifting bodies at hypersonic speeds. Third European Mechanics Colloquium, Aachen, February 1966, RAE Technical Memorandum Aero 916.
3. K�chemann, D.: Some developments in aerofoil theory. The Eleventh Ludwieg-Prandtl Memorial Lecture, Z�rich, 1967; RAE Technical Report 67051 (ARC 29228) (1967).
4. Oswatitsch, K.: Antriebe mit Heizung bei �berschallgeschwindigkeit. DVL-Bericht 90 (1959), RAE Library Translation 811, Propulsion through heating at supersonic speed.
5. Zierep, J.: �ber den Einflu� der W�rmezufuhr bei Hyperschallstr�mungen. Acta Mech.2, 217 (1966); RAE Library Translation 1222, On the influence of the addition of heat to hypersonic flow.