1. E. Giacobino, T. Debuisschert, C. Fabre, A. Heidmann, J. Mertz, S. Reynaud: Squeezed Light: Progress and Perspectives. In: Laser Spectroscopy IX, Proc. Ninth Int'l Conference on Laser Spectroscopy — Bretton Woods, New Hampshire, 1989, ed. by M.S. Feld, J.E. Thomas, A. Mooradian (Academic, San Diego 1989) pp. 180–183
2. H.J. Kimble: In Atomic Physics II, ed. by S. Haroche, J.C. Gay, G. Gimbera (World Scientific, Singapore 1989) p. 467
3. V.N. Lisitsyn, V.P. Chebotayev: Sov. Phys. JETP 27, 227 (1968); JETP Lett. 7, 3 (1968)
4. A.P. Kazantsev, G.I. Suredutovich: The Quantum Theory of the Laser. In Progress in Quantum Electronics, ed. by J.H. Sanders, S. Stenholm (Pergamon, Oxford 1975)
5. S.L. McCall: Phys. Rev. A 9, 1515 (1974); also see, B.R. Mollow: Phys. Rev. A7, 1319 (1973)