@Misc{ FonLeoMor16, author = { Fonseca, Irene and Leoni, Giovanni and Mora, Maria Giovanna }, title = { A Second Order Minimality Condition for a Free-Boundary Problem }, journal = { }, year = { 2016 }, pages = { }, URL = { http://cvgmt.sns.it/paper/3058/ }, note = { cvgmt preprint} }