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Blasone, M.; Evans, T. S.; Steer, D. A.; Vitiello, G. On normal ordering and canonical transformations in thermal field theory. (English) Zbl 1055.81622 J. Phys. A, Math. Gen. 32, No. 7, 1185-1195 (1999). MSC: 81T99 PDFBibTeX XMLCite \textit{M. Blasone} et al., J. Phys. A, Math. Gen. 32, No. 7, 1185--1195 (1999; Zbl 1055.81622) Full Text: DOI arXiv
Evans, T. S.; Kibble, T. W. B.; Steer, D. A. Wick’s theorem for nonsymmetric normal ordered products and contractions. (English) Zbl 0976.81017 J. Math. Phys. 39, No. 11, 5726-5738 (1998). MSC: 81S05 81T99 PDFBibTeX XMLCite \textit{T. S. Evans} et al., J. Math. Phys. 39, No. 11, 5726--5738 (1998; Zbl 0976.81017) Full Text: DOI arXiv
Evans, T. S.; Steer, D. A. Wick’s theorem at finite temperature. (English) Zbl 0925.81401 Nucl. Phys., B 474, No. 2, 481-496 (1996). MSC: 81T99 PDFBibTeX XMLCite \textit{T. S. Evans} and \textit{D. A. Steer}, Nucl. Phys., B 474, No. 2, 481--496 (1996; Zbl 0925.81401) Full Text: DOI arXiv