1. 1Empirical Systems Aerospace, Inc. "Integration of an Advanced Cryogenic Electric Propulsion System (ACEPS) to Aerodynamically Efficient Subsonic Transport Aircraft," NASA SBIR Phase I Final Report, Contract No. NNX09CC86P, 2009.
2. 2Empirical Systems Aerospace, Inc. "The Design and Integration of a Distributed Fan Propulsion System within a Split-Wing," NASA SBIR Phase I Final Report, Contract No. NNX10CC81P, 2010.
3. Benefits and Concerns of Hybrid Electric Distributed Propulsion with Conventional Electric Machines
4. 4Empirical Systems Aerospace, Inc. "Cryogenic and Non-Cryogenic Hybrid Electric Distributed Propulsion with Integration of Airframe and Thermal Systems to Analyze Technology Influence," NASA SBIR Phase I Final Report, Contract No. NNX15CD15P, 2015.
5. Integrated Aerodynamic Benefits of Distributed Propulsion