1. High altitude long endurance technologies for sensorcraft;Tilmann,2003
2. Technical findings, lessons learned, and recommendations resulting from the Helios prototype vehicle mishap;Noll,2007
3. Nonlinear aeroelastic analysis of complete aircraft in subsonic flow;Patil;J. Aircr.,2000
4. Nonlinear aeroelasticity and flight dynamics of high-altitude long-endurance aircraft;Patil;J. Aircr.,2001
5. Aeroelasticity of nonconventional airplane configurations–past and future;Livne;J. Aircr.,2003