1. Boerner, C. J.: Compressible Swirling Flow through Nozzles. Ph.D. Thesis, Dec. 1970, University of Minnesotta, Minneapolis, Minn.
2. Norton, D. J., Farquhar, B. W., Hoffman, J. B.: An Analytical Investigation of the Fluid Mechanics of Rotating Flows in Rocket Motors. TM-67-7, Oct. 1967, Jet Propulsion Center, Purdue University, Lafayette, Ind.
3. Norton, D. J., Farquhar, B. W., Hoffman, J. B.: An Analytical and Experimental Investigation of Swirling Flow in Nozzles. F-67-9, Oct. 1967, Jet Propulsion Center, Purdue University, Lafayette, Ind.
4. Lewellen, W. S., Burns, W. J., Strickland, H. J.: Transonic Swirling Flow. AIAA Journal 7, No. 7 (1969) 1290/1297.
5. King, W. S.: On Swirling Nozzle Flows. Journal of Spacecraft and Rockets 4, No. 10 (1967) 1404/1405.