Zhisheng Niu, Song Liu, Stephane Vollet, A Broadband Mobile Multimedia Access System based on the High Altitude Stratospheric Platforms, in Proc. Future Telecommunications Conference 2001, pp. 16-21, Nov. 2001.
Zhisheng Niu, Song Liu, Stephane Vollet, Zhixing Yang, Youshou Wu, An Integrated ATM System Based on High Altitude Platforms (HAPs), ATM Interact Symposium 2001, pp.243-251, 22-24th August 2001, New Delhi, India.