1. S. Braunstein and P. van Loock, Rev. Mod. Phys. 77, 513 (2005).
2. A. Ferraro, S. Olivares, and M. G. A. Paris, “Gaussian States in Quantum Information,” Napoli Series on Physics and Astrophysics (Bibliopolis, Napoli, 2005); quantph/0503237.
3. Quantum Interferometry III, Ed. by F. De Martini, G. Denardo, and L. Hardy, Special issue of Fort. Phys. 48 (2000);
4. Quantum Interferometry IV, Special issue of Fort. Phys. 51 (2003).
5. Quantum Communication, Computing and Measurement II, Ed. by P. Kumar, G. M. D’Ariano, and O. Hirota, (Kluwer, Dordrecht, 2000); Quantum Communication, Computing and Measurement III, Ed. by P. Tombesi and O. Hirota (Kluwer, Dordrecht, 2001).