T. Binnewies

Calcium optical frequency standard

Juergen Helmcke, Harald Schnatz, Uwe Sterr, 2001, SPIE LASE.

Improvement of the fractional uncertainty of a neutral-atom calcium optical frequency standard to 2×10-14

Fritz Riehle, Uwe Sterr, C. Degenhardt, 2003 .

The optical Ca frequency standard

Harald Schnatz, Fritz Riehle, Burghard Lipphardt, 1999, Proceedings of the 1999 Joint Meeting of the European Frequency and Time Forum and the IEEE International Frequency Control Symposium (Cat. No.99CH36313).

Phase-coherent frequency measurement of the Ca intercombination line at 657 nm with a Kerr-lens mode-locked femtosecond laser

New Jersey, USA, Germany, 2000, physics/0010016.

An optical frequency standard with cold calcium atoms

Fritz Riehle, Uwe Sterr, C. Degenhardt, 2001 .