@Misc{ CupFusLan17, author = { Cupini, Giovanni and Fusco, Nicola and Lanconelli, Ermanno and Zhong, Xiao }, title = { A sharp stability result for the Gauss mean value formula }, journal = { J. Anal. Math. }, year = { 2019 }, pages = { }, URL = { http://cvgmt.sns.it/paper/3515/ }, note = { cvgmt preprint} }