@article{AIHPC_2012__29_1_21_0,
     author = {Croce, Gisella and Henrot, Antoine and Pisante, Giovanni},
     title = {An isoperimetric inequality for a nonlinear eigenvalue problem},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {21--34},
     publisher = {Elsevier},
     volume = {29},
     number = {1},
     year = {2012},
     doi = {10.1016/j.anihpc.2011.08.001},
     mrnumber = {2876245},
     zbl = {1243.49048},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1016/j.anihpc.2011.08.001/}
}