1. H.U. Martyn: in Quantum Electrodynamics, ed. T. Kinoshita, World Scientific, pp. 92???161 (1990);
2. T. Kinoshita and W.J. Marciano, ibid. pp. 419-478
3. V.W. Hughes and G. zu Putlitz: Quantum Electrodynamics, ed. T. Kinoshita, World Scientific, pp. 822–904 (1990)
4. K. Jungmann: in Muon Science, eds. S.L. Lee, S.H. Kilcoyne and R. Cywinsky, Inst. of Physics Publ., pp. 405–461 (1999) and references therein
5. M.I. Eides, H. Grotch and V.A. Shelyuto: Phys. Rep., to be published (2000), hep-ph/000215 (2000)