Waltman, S.
, Romanovsky, A.
, Wells, J.
, Fox, R.
, Hollberg, L.
, Sassi, M.
and Robinson, H.
(1992),
Precise Optical Frequency References and Difference Frequency Measurements with Diode Lasers, Conference on Frequency Stabilized Lasers and Their Applications , Boston, MA, USA
(Accessed March 13, 2025)