R. Nicholas Lanning, Zhihao Xiao, Mi Zhang, Irina Novikova, Eugeniy E. Mikhailov, and Jonathan P. Dowling, "Quantized nonlinear Gaussian-beam dynamics: Tailoring multimode squeezed-light generation", Phys. Rev. A, 98(4), 043824 (2018)
R. Nicholas Lanning, Zhihao Xiao, Mi Zhang, Irina Novikova, Eugeniy E. Mikhailov, and Jonathan P. Dowling, "Quantized nonlinear Gaussian-beam dynamics: Tailoring multimode squeezed-light generation", Phys. Rev. A, 98(4), 043824 (2018)