1. Airport to Orbit, A Comparison of Horizontal Takeoff RLVs;39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit;2003-06-26
2. A demonstrator for the SSTO launcher with combined cycle propulsion;Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences;1999-08
3. Airbreathing space boosters using in-flight oxidizer collection;Journal of Propulsion and Power;1996-03
4. Technology and staging effects on two-stage-to-orbit systems;Journal of Spacecraft and Rockets;1994-01
5. Eliminating LH2 in LOX-collect space launchers - Key to on-demand capability;29th Joint Propulsion Conference and Exhibit;1993-06-28