@article {MR3369874,
	title = {A degeneration of two-phase solutions of the focusing nonlinear Schr{\"o}dinger equation via Riemann-Hilbert problems},
	journal = {J. Math. Phys.},
	volume = {56},
	number = {6},
	year = {2015},
	pages = {061507, 17},
	issn = {0022-2488},
	doi = {10.1063/1.4922362},
	url = {http://dx.doi.org/10.1063/1.4922362},
	author = {Marco Bertola and Giavedoni, Pietro}
}
