Wineland, D.
, Weimer, C.
and Bollinger, J.
(1993),
Laser-Cooled Positron Source, Hyper-fine Interactions,, Antihydrogen Workshop , Munich, GE, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=105700
(Accessed March 13, 2025)