Chang, M. C.M. C.ChangYEE HSIUNGPAO-TI CHANGMIN-ZU WANGWEI-SHU HOUKAI-FENG CHEN2018-09-102018-09-102003-09http://inspirehep.net/record/628942http://scholars.lib.ntu.edu.tw/handle/123456789/302794Search for $B^0 \\to \\ell^{+} \\ell^{-}$ at BELLEjournal article10.1103/PhysRevD.68.111101