“Superconducting-cavity-stabilized oscillators (SCSO) for precise frequency measurements”, N.-C. Yeh, D. M. Strayer, V. L. Anderson, and N. Asplund, Physica B 280, 557(2000).
http://www.sciencedirect.com/science/article/pii/S0921452699018633
“Superconducting-cavity-stabilized oscillators (SCSO) for precise frequency measurements”, N.-C. Yeh, D. M. Strayer, V. L. Anderson, and N. Asplund, Physica B 280, 557(2000).
http://www.sciencedirect.com/science/article/pii/S0921452699018633