1. G. Alexander, G. Altarelli, A. Blondel, G. Coignet, E. Keil, D.E. Plane and D. Treille, ed., Polarization at LEP, CERN Yellow Book 88-06
2. G. Altarelli, R. Kleiss and C. Verzegnassi, ed., Z-physics at LEP 1, CERN Yellow Book 89-08
3. B.W. Lynn, M.E. Peskin and R.G. Stuart, in CERN Yellow Book 86-02, ed. J. Ellis and R. Peccei, p. 90
4. Limit on mass differences in the Weinberg model
5. Electroweak one-loop corrections to the decay of the neutral vector boson