1985 · R.R. Hayes, H.T.W. Wang · Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS) · 3
1988 · E. S. Richter, B. A. Bettencourt, et al. · Proceedings of the ... annual Precise Time and Time Interval (PTTI) Systems and Applications Meeting/Proceedings of a meeting - Precise Time and Time Interval (PTTI) Systems and Applications Meeting · 2