1. PWA-4372;Mahler F.,1972
2. Dugan , J. F. , McAulay , J. E. , Reynolds , T. W. , and Struck , W. C. “Fuel-Conservative Engine Technology,” NASA SP-381 , Aeronautical Propulsion , pp 157 – 190 ( 1975 ).
3. SAE Paper 760538;Stern J.,1976
4. SAE Paper 760504;Grayson K.,1976