New heavy charged leptons at future high energy electron-positron collidersF. M. L. Almeida Jr., Y. A. Coutinho, J. A. Martins Simões, S. Wulck and M. A. B. do ValeEur. Phys. J. C, 30 3 (2003) 327-335DOI: https://doi.org/10.1140/epjc/s2003-01298-9