%0 Journal Article %A Rémi Carles %A Eric Dumas %A Christof Sparber %T Geometric optics and instability for NLS and Davey–Stewartson models %J Journal of the European Mathematical Society %D 2012 %P 1885-1921 %V 14 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4171/jems/350/ %R 10.4171/jems/350 %F JEMS_2012_14_6_a5