%0 Journal Article %A Mazzoleni, Dario %A Trey, Baptiste %A Velichkov, Bozhidar %T Regularity of the optimal sets for the second Dirichlet eigenvalue %J Annales de l'I.H.P. Analyse non linéaire %D 2022 %P 529-573 %V 39 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4171/aihpc/14/ %R 10.4171/aihpc/14 %G en %F AIHPC_2022__39_3_529_0