Oates, C.
, Bondu, F.
, Fox, R.
and Hollberg, L.
(1999),
A Diode-Laser Optical Frequency Standard Based on Laser-Cooled Ca Atoms: Sub-kilohertz Spectroscopy by Optical Shelving Detection, European Physical Journal D, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=105042
(Accessed December 12, 2024)