@article{CRMATH_2005__340_5_347_0,
     author = {Hamel, Fran\c{c}ois and Nadirashvili, Nikolai and Russ, Emmanuel},
     title = {An isoperimetric inequality for the principal eigenvalue of the {Laplacian} with drift},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {347--352},
     publisher = {Elsevier},
     volume = {340},
     number = {5},
     year = {2005},
     doi = {10.1016/j.crma.2005.01.012},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2005.01.012/}
}