@article{Hajaiej:130264,
      title = {On the variational approach to the stability of standing  waves for the nonlinear Schrödinger equation},
      author = {Hajaiej, Hichem and Stuart, Charles Alexander},
      journal = {Adv. Nonlinear Stud.},
      number = {4},
      volume = {4},
      pages = {469-501},
      year = {2004},
      url = {http://infoscience.epfl.ch/record/130264},
}