1. Dzyaloshinskii IE, Lifshitz EM, Pitaevskii LP (1961) Adv. Phys. 10:165
2. Langbein D (1974) Springer Tr. Mod. Phys. 72:1
3. Mahanty J, Ninham BW (1976) Dispersion Forces. Academic, London
4. E.A. Hinds, in Advances in Atomic, Molecular, and Optical Physics, vol 28, ed. by D. Bates, B. Bederson (Academic, New York, 1991), p. 237
5. Milonni PW (1994) The Quantum Vacuum, An Introduction to Quantum Electrodynamics. Academic, San Diego, CA