L. K. Gibbons et al.YEE HSIUNG2018-09-102018-09-101988-10http://inspirehep.net/record/24460http://scholars.lib.ntu.edu.tw/handle/123456789/340228NEW LIMITS ON K(L), K(S) ---> pi0 e+ e-journal article10.1103/PhysRevLett.61.2661