@article{10_4007_annals_2011_174_2_1,
     author = {Fran\c{c}ois Hamel and Nikolai Nadirashvili and Emmanuel Russ},
     title = {Rearrangement inequalities and applications to isoperimetric problems for eigenvalues},
     journal = {Annals of mathematics},
     pages = {647--755},
     publisher = {mathdoc},
     volume = {174},
     number = {2},
     year = {2011},
     doi = {10.4007/annals.2011.174.2.1},
     mrnumber = {2831107},
     zbl = {05960716},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4007/annals.2011.174.2.1/}
}