Kips, A.J.R ; Vassen, W ; Hogervorst, W Kips , A J R , Vassen , W & Hogervorst , W 1998 , ' Scaled-energy spectroscopy of helium M=1 Rydberg atoms in a static electric field. ' , Physical Review A. Atomic, Molecular and Optical Physics , vol. 58 , pp. 3043-3050 . https://doi.org/10.1103/PhysRevA.58.3043.
,
1998