1. See for example: S. Dittmaier, K. Mönig (eds.), Electroweak Precision Data and the Higgs Mass, Proceedings of the Workshop at DESY-Zeuthen, 28 Feb-1 March 2003, DESY-PROC-2003-01; ALEPH, DELPHI, L3, OPAL Collaborations, the LEP electroweak working group and the SLD electroweak and heavy flavour group, A Combination of Preliminary Electroweak Measurements and Constraints on the Standard Model, CERN-PH-EP-2004-069
2. CDF and D0 Collaborations and the Tevatron Electroweak Working group, Combination of CDF and D0 Results on the Top Quark Mass, hep-ex/0404010
3. OPAL Collaboration, G. Abbiendi, 262003321
4. OPAL Collaboration, K. Ackerstaff, 3891996416
5. OPAL Collaboration, K. Ackerstaff, 11998395