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)

171Yb+ Single-Ion Optical Frequency Standard at 688 THz. - Christian Tamm; Burghard Lipphardt; Harald Schnatz; Robert Wynands; Stefan Weyers; Tobias Schneider; Ekkehard Peik (IEEE Trans. Instrum. Meas., 2007)