1985 · J.S. Wang, A. Kong, et al. · Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS) · 3
2004 · Chi-Yuan Lee, Tsung-Tsong Wu, et al. · Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)