Leptonic Decays of Vector Mesons: the Branching Ratio of the Electron-Positron Decay Mode of the Phi MesonRemoveU. Becker, William K. Bertram, M. Binkley, C. L. Jordan, T. M. Knasel, R. Marshall, D. J. Quinn, M. Rohde, A. J. S. Smith, and Samuel C. C. TingPhys. Rev. Lett. 21, 1504 (1968)