1. Ablowitz, M.J., Ablowitz, M.A., Prinari, B., Trubatch, A.D.: Discrete and Continuous nonlinear Schrödinger System, pp. 31–35. Cambridge University Press, Cambridge (2004)
2. Anderson, D.: Variational approach to nonlinear pulse propagation in optical fibers. Phys. Rev. Lett. 27, 3135–3145 (1983)
3. Bedaque, P.F., Braaten, E., Hammer, H.W.: Three-body recombination in Bose gases with large scattering length. Phys. Rev. Lett. 908, 50 (2000)
4. Benney, D.J., Newell, A.C.: Propagation of nonlinear wave envelopes. J. Math. Phys. 46, 133–139 (1967)
5. Biondini, G., Kovačič, G.: Inverse scattering transform for the focusing nonlinear Schrödinger equation with nonzero boundary conditions. J. Math. Phys. 55, 506 (2014)