Shcherbakov, A., and A. Aguirre Lopez. “Optically Pumped Generation of Multi-Pulse Three-Wave Coupled States in a Two-Mode Waveguide With a Square-Law Nonlinearity and Digital Modulation of Light”. Revista Mexicana De Física, vol. 54, no. 5, Jan. 2008, pp. 368-0, https://rmf.smf.mx/ojs/index.php/rmf/article/view/3634.