A three-way, on-site comparison of the 10 V Josephson voltage standards of the PTB, the SP, and the BIPM. - Dominique Reymann; Thomas J. Witt; Gunnar Eklund; Hannu Pajander; Håkan Nilsson; Ralf Behr; Torsten Funck; Franz Müller 002 (IEEE Trans. Instrum. Meas., 1999)