1. Hamilton Walker Rotary Engine;Weekly News,1968
2. A new class of rotary piston suitable for compressors, pumps, and internal combustion engines;Walker;Proc. Inst. Mech. Eng.,1972
3. Quasiturbine Stirling engine, Stirling engine idea on the Quasiturbine websitehttps://en.wikipedia.org/wiki/Quasiturbine
4. Quasiturbine: Low RPM high torque driven turbine for top efficiency power modulation;Gilles;ASME Turbo Expo,2007
5. Hypersonic Airbreathing Propulsion;Heiser,1994