Isolated lepton events at HERA: SUSY R-parity violation? S.Y. Choi, J. Kalinowski, H.-U. Martyn, R. Rückl, H. Spiesberger and P.M. Zerwas Eur. Phys. J. C, 51 3 (2007) 543-548 Published online: 22 June 2007 DOI: 10.1140/epjc/s10052-007-0313-8