D. Danielli, N. Garofalo, S. Salsa: Variational inequalities with lack of ellipticity. Part I: optimal interior regularity and non-degeneracy of the free boundary Indiana University Math J (Accepted Paper) 2001 D. Danielli, A. Petrosyan, H. Shahgholian: A singular perturbation problem for the p-Laplace operator Indiana Univ. Math. Jour. (Accepted Paper) 2001 D. Danielli, N. Garofalo: Green functions in nonlinear potential theory in Carnot groups and the geometry of their level sets (Preprint) 2001 D. Danielli, N. Garofalo: Properties of entire solutions of non-uniformly elliptic equations arising in geometry and in phase transitions Calculus of Variations (Accepted Paper) 2001 D. Danielli, N. Garofalo, D. M. Nhieu: Minimal surfaces, surfaces of constant mean curvature and isoperimetry in Carnot groups (Preprint) 2002 D. Danielli: A singular perturbation approach to a two phase parabolic free boundary problem arising in combustion theory (Submitted Paper) 2002 D. Danielli, N. Garofalo, D. M. Nhieu: On the best possible character of the $L^Q$ norm in some a priori estimates for non-divergence form equations in Carnot groups Proc. of the Amer. Math. Soc. (Accepted Paper) 2002 D. Danielli, N. Garofalo, D. M. Nhieu: Notions of convexity in Carnot groups Communications in Analysis and Geometry (Accepted Paper) 2002 D. Danielli, N. Garofalo, D. M. Nhieu: Notions of convexity in Carnot groups Comm. in Analysis and Geometry (Accepted Paper) Vol. 11, N. 2, p. 263-341, 2003 D. Danielli, N. Garofalo, D. M. Nhieu: Non-doubling Ahlfors measures, Perimeter measures, and the characterization of the trace spaces of Sobolev functions in Carnot-Carathéodory spaces Memoirs Amer. Math. Soc. (Accepted Paper) 2003 D. Danielli, A. Petrosyan: A minimum problem with free boundary for a degenerate quasilinear operator (Submitted Paper) 2003 D. Danielli, R. Ognibene: On a weighted two-phase boundary obstacle problem Indiana University Mathematics Journal (Accepted Paper) 2021