Bollinger, J.
, Heinzen, D.
, Moore, F.
, Itano, W.
and Wineland, D.
(1992),
Low Order Modes of an Ion Cloud in a Penning Trap, Physica Scripta, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=104861
(Accessed October 31, 2024)