1. Souders, T.M., Shoenwetter, H.K., and Hetrick, P.S., Characterisation of a sampling voltage tracker for measuring fast repetitive signals, IEEE Trans. Instrum. Meas., 1987, vol. 36, pp. 956–960.
2. Souders, T.M. and Hetrick, P.S., Accurate RF voltage measurement using a sampling voltage tracker IEEE Trans. Instrum. Meas., 1989, vol. 38, pp. 451–456.
3. Laug, O.B., Souders, T.M., and Flach, D.R., Custom integrated circuit comparator for high-performance sampling applications IEEE Trans. Instrum. Measur., 1992, vol. 41, no. 6, pp. 850–855.
4. Bergman, D.I., An accurate pulse measurement system for real-time oscilloscope calibration. NCSLI measure J. Measur. Sci., 2006, vol. 1, no. 3, pp. 22–29.
5. Laug, O.B., Bergman, D.I., Souders, T.M., and Waltrip, B.C., A next generation sampling comparator probe for the NIST sampling waveweform analyser, NIST Tech. Note, 2008, no. 1496.