1. A role for ammonia in the hydrogen economy;Avery;Int J Hydrogen Energy,1988
2. Ammonia as an engine fuel;Cornelius,1965
3. Performance of anhydrous ammonia as a spark ignition engine fuel;Smith,1966
4. Ammonia as a diesel engine fuel: theory and application;Starkman,1967
5. Hypersonics before the shuttle: a concise history of the X-15 research airplane;Jenkins,2000