[17] D. Klyshko. Photons and Nonlinear Optics(1988).
[20] W. Vogel, D.-G. Welsch. Quantum Optics(2006).
[21] M. Liscidini, J. E. Sipe. Stimulated emission tomography. Phys. Rev. Lett., 111, 193602(2013).
[23] F. Lenzini, A. N. Poddubny, J. Titchener, P. Fisher, A. Boes, S. Kasture, B. Haylock, M. Villa, A. Mitchell, A. S. Solntsev, A. A. Sukhorukov, M. Lobino. Direct characterization of a nonlinear photonic circuit’s wave function with laser light(2017).