L. Ambrosio, G. De Philippis and L. Martinazzi, Gamma-convergence of nonlocal perimeter functionals, Manuscripta Math. 134 (2011), no. 3-4, 377-403.
 C. Bjorland, L. Caffarelli and A. Figalli, Non-Local Tug-of-War and the Infinity Fractional Laplacian, Comm. Pure Applied Math., to appear.
 C. Bjorland, L. Caffarelli and A. Figalli, Non-Local Gradient Dependent Operators, preprint.
 L. Caffarelli, J.-M. Roquejoffre and O. Savin, Nonlocal minimal surfaces, Comm. Pure Appl. Math. 63 (2010), no. 9, 1111-1144.
 L. Caffarelli and L. Silvestre, Regularity theory for fully nonlinear integro-differential equations. Comm. Pure Appl. Math. 62 (2009), no. 5, 597-638
 L. Caffarelli and L. Silvestre, Regularity results for nonlocal equations by approximation, Arch. Rational Mech. Anal. 200 (2011), no. 1, 59-88.
 L. Caffarelli and L. Silvestre, The Evans-Krylov theorem for non local fully non linear equations, preprint, http://arxiv.org/abs/0905.1339
 L. Caffarelli and P. E. Souganidis, Convergence of nonlocal threshold dynamics approximations to front propagation, Arch. Ration. Mech. Anal. 195 (2010), no. 1, 1-23.
 L. Caffarelli and E. Valdinoci, Uniform estimates and limiting arguments for nonlocal minimal surfaces, Calc. Var. Partial Differential Equations 41 (2011), no. 1-2, 203-240.
 L. Caffarelli and E. Valdinoci, Regularity properties of nonlocal minimal surfaces via limiting arguments, preprint, http://arxiv.org/abs/1105.1158
 E. Di Nezza, G. Palatucci and E. Valdinoci, Hitchhiker's guide to the fractional Sobolev spaces, preprint, http://arxiv.org/abs/1104.4345
 D. Gilbarg and N. S. Trudinger, Elliptic partial differential equations of second order, Classics in Mathematics, Springer, Berlin (2001).
 O. Savin and E. Valdinoci, Density estimates for a variational model driven by the Gagliardo norm, preprint, http://arxiv.org/abs/1007.2114
 O. Savin and E. Valdinoci, Γ-convergence for nonlocal phase transitions, preprint, http://arxiv.org/abs/1007.1725
 O. Savin and E. Valdinoci, Regularity of nonlocal minimal cones in dimension 2, preprint, http://www.ma.utexas.edu/mp arc-bin/mpa?yn=12-8