D. Reymann et al., COMPARISON OF THE JOSEPHSON VOLTAGE STANDARDS OF THE SP AND THE BIPM, IEEE transactions on instrumentation and measurement, 46(2), 1997, pp. 220-223
Comparisons of the 1 V Josephson-array voltage standard (JAVS) of the
Bureau International des Poids et Mesures (BIPM) were made with that o
f the Swedish National Testing and Research Institute (SP), Boras, Swe
den, in April 1996, The results agree within an overall uncertainty of
less than 1 nV.