TY - JOUR T1 - A degeneration of two-phase solutions of the focusing nonlinear Schrödinger equation via Riemann-Hilbert problems JF - J. Math. Phys. Y1 - 2015 A1 - Marco Bertola A1 - Giavedoni, Pietro VL - 56 UR - http://dx.doi.org/10.1063/1.4922362 ER -