Search for a fourth generation b’-quark at LEP-II at 196–209 GeV J. Abdallah, P. Abreu, W. Adam, P. Adzic, T. Albrecht, R. Alemany-Fernandez, T. Allmendinger, P.P. Allport, U. Amaldi, N. Amapane et al. (339 more) Eur. Phys. J. C, 50 3 (2007) 507-518 Published online: 29 March 2007 DOI: 10.1140/epjc/s10052-007-0273-z