Bergeson, S.
, Balakrishnan, A.
, Baldwin, K.
, Lucatorto, T.
, Marangos, J.
, McIlrath, T.
, O'Brian, T.
, Rolston, S.
, Sansonetti, C.
, Wen, J.
, Westbrook, N.
, Cheng, C.
and Eyler, E.
(1998),
Measurement of the He Ground State Lamb Shift via the Two-photon 1<sup>1</sup>S-2<sup>1</sup>S Transition: A New Approach for Testing QED at Order α<sup>4</sup>Ry and Beyond, Physical Review Letters
(Accessed October 3, 2024)