@article{ASENS_1998_4_31_6_843_0,
     author = {Lerner, Nicolas},
     title = {Perturbation and energy estimates},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {843--886},
     publisher = {Elsevier},
     volume = {Ser. 4, 31},
     number = {6},
     year = {1998},
     doi = {10.1016/s0012-9593(99)80005-6},
     mrnumber = {2000b:35289},
     zbl = {0927.35139},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1016/s0012-9593(99)80005-6/}
}