@article{BUMI_2001_8_4B_2_a11,
     author = {Anane, Aomar and Chakrone, Omar and Gossez, Jean-Pierre},
     title = {Spectre d'ordre sup\'erieur et probl\`emes aux limites quasi-lin\'eaires},
     journal = {Bollettino della Unione matematica italiana},
     pages = {483--519},
     publisher = {mathdoc},
     volume = {Ser. 8, 4B},
     number = {2},
     year = {2001},
     zbl = {1177.35089},
     mrnumber = {920052},
     url = {http://geodesic.mathdoc.fr/item/BUMI_2001_8_4B_2_a11/}
}