1. Operational capability of high altitude solar powered airships;Miller,2005
2. The high altitude lighter than air airship efforts at the US army space and missile defense command/army forces strategic command;Lee,2009
3. High-altitude, Long-Endurance Airships for Coastal Surveillance;Dolce,2005
4. A modular sizing model for high-altitude/long-endurance airships;Lobbia,2006
5. Curved surface renewable solar cell applied to near space airship energy system;Su,2008