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2. U. Weiss, Quantum Dissipative Systems (World Scientific, Singapore, 2000)
3. H.J. Carmichael, An Open Systems Approach to Quantum Optics (Springer, Berlin, 2009)
4. H.J. Carmichael, Statistical Methods in Quantum Optics I: Master Equations and Fokker-Planck Equations (Springer, Berlin, 1999)
5. R. Alicki, K. Lendi, Quantum Dynamical Semigroups and Applications (Springer, Berlin, 1987)