@UNPUBLISHED{publication1, title = "Regularity of interfaces for a Pucci type segregation problem", author = "{CAFFARELLI, Luis A.} and {PATRIZI, S.} and {QUITALO, Veronica} and {TORRES, M.}", year = "2018-03-05", url = "http://www.mat.uc.pt/preprints/eng\_2018.html", note = "" }