Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Cheon Il-Tong,Measurement of the Width of the First Excited State in 133Cs.,Journal of the Physical Society of Japan,00319015,THE PHYSICAL SOCIETY OF JAPAN,2001,70,11,3193-3196,https://cir.nii.ac.jp/crid/1390001204184907776,https://doi.org/10.1143/jpsj.70.3193