CP-violation in the production of τ-leptons at TESLA with beam polarization B. Ananthanarayan, S.D. Rindani and A. Stahl Eur. Phys. J. C, 27 1 (2003) 33-41 Published online: 20 December 2002 DOI: 10.1140/epjc/s2002-01087-0