1. Pintle injectors;Heister,2011
2. TRW Pintle Engine Heritage and Performance Characteristics;Dressler,2000
3. The lunar module descent engine - a historical perspective;Gilroy,1989
4. The descent engine for the lunar module;Elverum,1967
5. Summary of deep throttling rocket engines with emphasis on Apollo LMDE;Dressler,2006