Transverse nonlinear instability for two-dimensional dispersive models F. Rousset; N. Tzvetkov — 2009 Annales de l'I.H.P. Analyse non linéaire
On nonlinear Schrödinger equations in exterior domains N Burq; P Gérard; N Tzvetkov — 2004 Annales de l'I.H.P. Analyse non linéaire