1. F. del Aquila, M. Martínez and M. Quirós, CERN-TH.6389/92.
2. E. Blucher, J. Jowett, F. Merritt, G. Mikenberg, J. Panman, F.M. Renard and D. Treille, eds., Report of the Working Group on High Luminosities at LEP, CERN 91-02.
3. First observation of transverse beam polarization in LEP
4. A. De Rújula, M.B. Gavela, P. Hernandez and E. Massó, CERN-TH.6272/91.
5. On the definition of the Z-boson mass