Hollberg, L.
, Oates, C.
, Curtis, E.
, Ivanov, E.
, Diddams, S.
, Udem, T.
, Robinson, H.
, Bergquist, J.
, Itano, W.
, Drullinger, R.
and Wineland, D.
(2002),
Optical Frequency Standards and Measurements, IEEE Journal of Quantum Electronics
(Accessed December 30, 2024)