1. Tjoelker, R.L., Prestage, J.D., Dick, G.J., and Maleki, L., Proc. 1993 IEEE Int. Frequency Control Symp., 1993, p. 132.
2. Burt, E.A., Diener, W.A., and Tjoelker, R. L., IEEE Trans. Ultrason. Ferroelectr. Freq. Control, 2008, vol. 55, no. 12, p. 2586. doi 10.1109/TUFFC.2008.975
3. Tjoelker, R.L., Burt, E.A., Chung, S., Hamell, R.L., Prestage, J.D., Tucker, B., Cash, P., and Lutwak, R., Proc. 43rd Annual Precise Time and Time Interval Systems and Applications Meeting, Long Beach, California, 2011, p. 293.
4. Burt, E.A. and Tjoelker, R.L., Proc. 39th Annual Precise Time and Time Interval Meeting, Long Beach, California, 2007, p. 309.
5. Burt, E.A., Lin, Y., Tucker, B., Hamell, R., and Tjoelker, R.L., IEEE Trans. Ultrason. Ferroelectr. Freq. Control, 2016, vol. 63, no. 7, p. 1013. doi 10.1109/ TUFFC.2016.2572701