@article{JEMS_2012_14_6_a5,
     author = {R\'emi Carles and Eric Dumas and Christof Sparber},
     title = {Geometric optics and instability for {NLS} and {Davey{\textendash}Stewartson} models},
     journal = {Journal of the European Mathematical Society},
     pages = {1885--1921},
     publisher = {mathdoc},
     volume = {14},
     number = {6},
     year = {2012},
     doi = {10.4171/jems/350},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/350/}
}