1. G. Buchalla, A.J. Buras, M.E. Lautenbacher, Rev. Mod. Phys. 68, 1125 (1996)
2. For recent reviews of rare B decays, see T. Hurth, hep-ph/0212304; M. Battaglia et al., hep-ph/0304132
3. S.W. Bosch, G. Buchalla, in Proceedings of the Second Workshop on the CKM Unitarity Triangle, IPPP Duram, April 2003, edited by P. Pall, J. Flynn, P. Kluit, A. Stocchi, eConf C0304052:WG203 (2003)
4. C. Jessop, A world average for $B \to X_s \gamma$ , SLAC-PUB-9610
5. K.G. Chetyrkin, M. Misiak, M. Munz, Phys. Lett. B 400, 206 (1997); 425, 414(E) (1998)