M. N. Mahalakshmi and G. Sadashivappa, “An Investigation of Cross-Phase Modulation and Machine Learning Based Alleviation of Nonlinear Effects in a DP-QPSK Based DWDM System”, Eng. Technol. Appl. Sci. Res., vol. 16, no. 2, pp. 33233–33238, Apr. 2026.