1R. Behr, L. Palafox, G. Ramm, H. Moser, and J. Melcher, "Direct comparison of Josephson waveforms using an acquantum voltmeter," IEEE Trans. Instrum. Meas. , vol. 56, no. 2, April 2007.
2A. Rtifenacht, C. J. Burroughs, P. D. Dresselhaus, and S. P. Benz, "Differential Sampling Measurement of a 7 V RMS Sine Wave With a Programmable Josephson Voltage Standard ", IEEE Trans. Instrum. Meas. , vol. 62, no. 6, June 2013.
3B. Jeanneret, F. Overney, L. Callegaro, A. Mortara, A. Riifenacht, "Josephson - Voltage - Standard - Locked Sine Wave Synthesizer: Margin Eval- uation and Stability", IEEE Trans. Instrum. Meas. , vol. 58, no. 4, April 2009.
4J. Lee, R. Behr, L. Palafox, A. Katkov, M. Schubert, M. Starkloff and A. C. Boeck, " An ac quantum voltmeter based on a 10V programmable Josephson array", Metrologia 50, 2013.
