@Article{ BuMaPrVe13, author = { Bucur, Dorin and Mazzoleni, Dario and Pratelli, Aldo and Velichkov, Bozhidar }, title = { Lipschitz regularity of the eigenfunctions on optimal domains }, journal = { Arch. Rat. Mech. Anal. }, year = { 2015 }, doi = { 10.1007/s00205-014-0801-6 }, pages = { }, URL = { http://cvgmt.sns.it/paper/2307/ }, note = { cvgmt preprint} }