1. G. Raithel, C. Wagner, H. Walther, L.M. Narducci, M.O. Scully, in Cavity Quantum Electrodynamics, edited by P.R. Berman (Academic Press, Boston, 1994) p. 57
2. H.J. Kimble, in Cavity Quantum Electrodynamics, edited by P.R. Berman (Academic Press, Boston, 1994), p. 203
3. M. Löffler, G.M. Meyer, H. Walther, Phys. Rev. A 55, 3923 (1997)
4. M.G. Raizen, R.J. Thompson, R.J. Brecha, H.J. Kimble, H.J. Carmichael, Phys. Rev. Lett. 63, 240 (1989)
5. G. Rempe, R.J. Thompson, R.J. Brecha, W.D. Lee, H.J. Kimble, Phys. Rev. Lett. 67, 1727 (1991)