1. F.T. Arecchi, E. Gatti, A. Sona, Time difference of photons from coherent and Gaussian sources. Phys. Lett. 20, 27–29 (1966). http://fox.ino.it/home/arecchi/SezA/fis26.pdf
2. H.A. Bachor, T.C. Ralph, A Guide to Experiments in Quantum Optics, 2nd ed. (Wiley-VCH Verlag, Weinheim, 2004). ISBN 3-527-40393-0. https://onlinelibrary.wiley.com/doi/book/10.1002/9783527619238
3. Baker-Campbell-Hausdorff Theorem. http://webhome.phy.duke.edu/~mehen/760/ProblemSets/BCH.pdf
4. U. Fano, Quantum theory of interference effects in the mixing of light from phase-independent sources. Am. J. Phys. 29, 539–545 (1961). https://aapt.scitation.org/doi/10.1119/1.1937827
5. M. Fox, Quantum Optics, an Introduction, (Oxford University Press, New York, 2006). ISBN 978-0-198-56673-1. https://global.oup.com/academic/product/quantum-optics-9780198566731?cc=fr&lang=en&