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"The optical calcium frequency standard."
Fritz Riehle et al. (1999)
- Fritz Riehle, Harald Schnatz, Burghard Lipphardt, Götz Zinner, Tilmann Trebst, Jürgen Helmcke:
The optical calcium frequency standard. IEEE Trans. Instrum. Meas. 48(2): 613-617 (1999)
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