Abouzaid E. et al.YEE HSIUNG2018-09-102018-09-102007-06http://inspirehep.net/record/754140http://scholars.lib.ntu.edu.tw/handle/123456789/331463Measurement of the Decay $K_L \\to \\pi^0 e^+ e^- \\gamma$journal article10.1103/PhysRevD.76.052001