@article {BertolaTovbisNLS2,
	title = {Universality for the focusing nonlinear Schr{\"o}dinger equation at the gradient catastrophe point: rational breathers and poles of the \it Tritronqu{\'e}e solution to Painlev{\'e} I},
	journal = {Comm. Pure Appl. Math.},
	volume = {66},
	number = {5},
	year = {2013},
	pages = {678{\textendash}752},
	issn = {0010-3640},
	doi = {10.1002/cpa.21445},
	url = {http://dx.doi.org/10.1002/cpa.21445},
	author = {Marco Bertola and Alexander Tovbis}
}
