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2. E.K.U. Gross, E. Runge, O. Heinonen, Many-Particle Theory, Adam Hilger, Bristol, Philadelphia and New York, 1991.
3. Transport, Collective Motion, and Brownian Motion
4. H. Grabert, Projection Operator Techniques in Nonequilibrium Statistical Mechanics, Springer, Berlin, 1982.
5. W.H. Louisell, Quantum Statistical Properties of Radiation, Wiley, New York, 1973.