Optical frequency standard based on cold Ca atoms. - Jürgen Helmcke; Guido Wilpers; Tomas Binnewies; Carsten Degenhardt; Uwe Sterr; Harald Schnatz; Fritz Riehle (IEEE Trans. Instrum. Meas., 2003)

Influence of chirped excitation pulses in an optical clock with ultracold calcium atoms. - Carsten Degenhardt; Tatiana Nazarova; Christian Lisdat; Hardo Stoehr; Uwe Sterr; Fritz Riehle (IEEE Trans. Instrum. Meas., 2005)

Optical frequency measurements using fs-comb generators. - Harald Schnatz; Burghard Lipphardt; Carsten Degenhardt; Ekkehard Peik; Tobias Schneider; Uwe Sterr; Christian Tamm (IEEE Trans. Instrum. Meas., 2005)