Hodby, E.
, Donley, E.
and Kitching, J.
(2007),
Differential magnetometry based on a diverging laser beam, Differential magnetometry based on a diverging laser beam, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50544, http://tf.nist.gov/ofm/smallclock/index.htm
(Accessed October 3, 2024)