1. Sharp, T. "SpaceShipOne: The first private spacecraft," Space.com Available: https://www.space.com/16769-spaceshiponefirst-private-spacecraft.html
2. Ignition!
3. Dixon, P.W. "Characterization of a Lab-Scale Polymethylmethacrylate and Gaseous Oxygen Hybrid Rocket", M.S. Thesis,North Dakota State University Mechanical Engineering Department, December 2022.