Is Vtb≃1? J. Alwall, R. Frederix, J.-M. Gérard, A. Giammanco, M. Herquet, S. Kalinin, E. Kou, V. Lemaitre and F. Maltoni Eur. Phys. J. C, 49 3 (2007) 791-801 Published online: 02 December 2006 DOI: 10.1140/epjc/s10052-006-0137-y