(1)
Gandzha, I. S.; Sedletsky, Y. V.; Dutykh, D. S. High-Order Nonlinear Schrödinger Equation for the Envelope of Slowly Modulated Gravity Waves on the Surface of Finite-Depth Fluid and Its Quasi-Soliton Solutions. Ukr. J. Phys. 2014, 59, 1201.