@article{AIHPC_2009__26_4_1149_0,
     author = {Brian\c{c}On, Tanguy and Lamboley, Jimmy},
     title = {Regularity of the {Optimal} {Shape} for the {First} {Eigenvalue} of the {Laplacian} {With} {Volume} and {Inclusion} {Constraints}},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {1149--1163},
     publisher = {Elsevier},
     volume = {26},
     number = {4},
     year = {2009},
     doi = {10.1016/j.anihpc.2008.07.003},
     mrnumber = {2542718},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.anihpc.2008.07.003/}
}