@Misc{ MazTerVel18, author = { Mazzoleni, Dario and Terracini, Susanna and Velichkov, Bozhidar }, title = { Regularity of the free boundary for the vectorial Bernoulli problem }, journal = { Analysis & PDE }, year = { 2018 }, pages = { }, URL = { http://cvgmt.sns.it/paper/3856/ }, note = { cvgmt preprint} }