Jürgen Melcher Jürgen Schurr Klaus Pierz Jonathan M. Williams Stephen P. Giblin F. Cabiati Luca Callegaro Giancarlo Marullo-Reedtz Cristina Cassiago Beat Jeckelmann Blaise Jeanneret Frédéric Overney Jaroslav Bohacek J. Riha O. Power J. Murray Mario Nunes M. Lobo I. Godinho The European ACQHE project: modular system for the calibration of capacitance standards based on the quantum Hall effect. 563-568 2003 52 IEEE T. Instrumentation and Measurement 2 http://dx.doi.org/10.1109/TIM.2003.810731 db/journals/tim/tim52.html#MelcherSPWGCCMCJJOBRPMNLG03