@Article{ BraDePVel13, author = { Brasco, Lorenzo and De Philippis, Guido and Velichkov, Bozhidar }, title = { Faber-Krahn inequalities in sharp quantitative form }, journal = { Duke Math. J. }, year = { 2015 }, volume = { 164 }, number = { 9 }, pages = { 1777-1832 }, URL = { http://cvgmt.sns.it/paper/2161/ }, note = { cvgmt preprint} }