Oates, C.
, Curtis, E.
and Hollberg, L.
(2000),
Improved Short-Term Stability of Optical Frequency Standards: Approaching 1 Hz in 1 s with the Ca Standard at 657 nm, Optics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=105041
(Accessed December 14, 2024)