V. F. Mukhanov, H. A. Feldman, and R. H. Brandenberger, Theory of cosmological perturbations. Part 1. Classical perturbations. Part 2. Quantum theory of perturbations, Phys. Rept, pp.215-203, 1992.
DOI : 10.1016/0370-1573(92)90044-z
URL : http://cds.cern.ch/record/573242/files/mukhanov.pdf

S. Weinberg, Quantum contributions to cosmological correlations, Physical Review D, vol.20, issue.4, pp.72-0506236, 2005.
DOI : 10.1063/1.1703941
URL : http://arxiv.org/abs/hep-th/0506236

F. Gelis, E. Iancu, J. Jalilian-marian, and R. Venugopalan, The Color Glass Condensate, Annual Review of Nuclear and Particle Science, vol.60, issue.1, pp.463-489, 2010.
DOI : 10.1146/annurev.nucl.010909.083629
URL : https://hal.archives-ouvertes.fr/cea-01004418

F. Gelis, Color Glass Condensate and Glasma, Int. J. Mod. Phys
DOI : 10.1016/j.nuclphysa.2010.09.001
URL : http://arxiv.org/abs/1009.0093

J. Schwinger, Brownian Motion of a Quantum Oscillator, Journal of Mathematical Physics, vol.2, issue.3, 1961.
DOI : 10.1063/1.1703661

P. M. Bakshi and K. T. Mahanthappa, Expectation Value Formalism in Quantum Field Theory. I, Journal of Mathematical Physics, vol.4, issue.1, pp.1-11, 1963.
DOI : 10.1103/PhysRev.90.690

P. M. Bakshi and K. T. Mahanthappa, Expectation Value Formalism in Quantum Field Theory. II, Journal of Mathematical Physics, vol.4, issue.1, pp.12-16, 1963.
DOI : 10.1103/PhysRev.92.1283

L. V. Keldysh, Diagram technique for nonequilibrium processes, Sov. Phys. JETP20, pp.1515-15271018, 1964.

K. Chou, Z. Su, B. Hao, and L. Yu, Equilibrium and nonequilibrium formalisms made unified, Physics Reports, vol.118, issue.1-2, 1985.
DOI : 10.1016/0370-1573(85)90136-X

R. D. Jordan, Effective field equations for expectation values, Physical Review D, vol.107, issue.2, pp.444-454, 1986.
DOI : 10.1103/PhysRevD.33.444

F. Gelis and R. Venugopalan, Particle production in field theories coupled to strong external sources, Nucl. Phys, vol.arXiv, pp.776-135, 2006.
DOI : 10.1016/j.nuclphysa.2006.11.152

F. Gelis and R. Venugopalan, Particle production in field theories coupled to strong external sources, II: Generating functions, Nuclear Physics A, vol.779, pp.779-177, 2006.
DOI : 10.1016/j.nuclphysa.2006.08.015
URL : http://arxiv.org/abs/hep-ph/0605246

F. Gelis, T. Lappi, and R. Venugopalan, High energy factorization in nucleus-nucleus collisions, Phys. Rev, vol.78, issue.054019, 2008.
DOI : 10.1143/ptps.174.190
URL : https://hal.archives-ouvertes.fr/cea-01004730

F. Gelis, T. Lappi, and R. Venugopalan, High energy factorization in nucleus-nucleus collisions. II. Multigluon correlations, Physical Review D, vol.18, issue.5, p.78, 2008.
DOI : 10.1088/1126-6708/2008/06/032
URL : https://hal.archives-ouvertes.fr/cea-01004730

S. Weinberg, Tree theorem for inflation, Physical Review D, vol.11, issue.6, p.78, 2008.
DOI : 10.1088/1475-7516/2008/03/014

P. Aurenche, T. Becherrawy, and E. Petitgirard, Retarded / advanced correlation functions and soft photon production in the hard loop approximation, pp.hep-ph

M. A. Van-eijck, R. Kobes, and C. G. Van-weert, Transformations of real-time finite-temperature Feynman rules, Physical Review D, vol.9, issue.6, pp.4097-4109, 1994.
DOI : 10.1103/PhysRevD.50.4097

X. Chen, M. H. Namjoo, and Y. Wang, On the equation-of-motion versus in-in approach in cosmological perturbation theory, Journal of Cosmology and Astroparticle Physics, vol.2016, issue.01, 1601.
DOI : 10.1088/1475-7516/2016/01/022

T. Epelbaum, F. Gelis, and B. Wu, Nonrenormalizability of the classical statistical approximation, Physical Review D, vol.2, issue.6
DOI : 10.1016/j.physletb.2003.12.047
URL : https://hal.archives-ouvertes.fr/cea-01004417

P. B. Greene, L. Kofman, A. D. Linde, and A. A. Starobinsky, Structure of resonance in preheating after inflation, Physical Review D, vol.116, issue.10, pp.6175-6192, 1997.
DOI : 10.1103/PhysRevD.56.6175

K. Dusling, T. Epelbaum, F. Gelis, and R. Venugopalan, Role of quantum fluctuations in a system with strong fields: Onset of hydrodynamical flow, Nuclear Physics A, vol.850, issue.1, pp.69-109, 2011.
DOI : 10.1016/j.nuclphysa.2010.11.009

P. Flajolet and R. Sedgewick, Analytic Combinatorics, 2009.
DOI : 10.1017/CBO9780511801655
URL : https://hal.archives-ouvertes.fr/inria-00072739