Blaise Jeanneret Frédéric Overney Luca Callegaro Alessandro Mortara Alain Rüfenacht Josephson-Voltage-Standard-Locked Sine Wave Synthesizer: Margin Evaluation and Stability. 791-796 2009 58 IEEE T. Instrumentation and Measurement 4 http://dx.doi.org/10.1109/TIM.2008.2006963 db/journals/tim/tim58.html#JeanneretOCMR09