1. J. Ou-Yang, W.D. Qu and Y.G. Xi:Industrial Instrumentation & Automation Vol. 1 (2004), p.64.
2. Y.G. Wang, W. Yao and Y. Li: Hot View Vol. 93 (2010), p.18.
3. Ryu M. Mikio S. R&D on Telecom and Broadcasting System Using High Altitude Platforms Conducted by CTL/TAO. The 3rd Stratospheric Platform Systems Workshop, Tokyo, Japan (2001), p.21.
4. W. Yao, Y. Li, W.J. Wang and W. Zhang : SPACECRAFT ENGINEERING Vol. 17(2008), p.70.
5. Lindstrand P. ESA-HALE Airship Research and Development Program, 2nd Stratospheric Platform Systems Workshop, SPSW2000 Organizing Comm., Tokyo (2000), p.15.