Proceedings of the 1998 IEEE International Frequency Control Symposium (Cat. No.98CH36165) Frequency control Frequency Control Symposium, 1998. Proceedings of the 1998 IEEE International. :555-562 1998
Proceedings of The 2nd International Conference on Satellite Communications Satellite Communications, 1996. Proceedings of ICSC '96. The 2nd International Conference on. 4:49-60 1996