@article{ASENS_1987_4_20_4_641_0,
     author = {Grigis, Alain},
     title = {Estimations asymptotiques des intervalles d'instabilit\'e pour l'\'equation de {Hill}},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {641--672},
     publisher = {Elsevier},
     volume = {4e s{\'e}rie, 20},
     number = {4},
     year = {1987},
     doi = {10.24033/asens.1548},
     mrnumber = {89e:34056},
     zbl = {0644.34021},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/asens.1548/}
}