@Article{ lusvit05, author = { Luca Lussardi and Enrico Vitali }, title = { Non-local approximation of free-discontinuity functionals with linear growth: the one-dimensional case }, journal = { Ann. Mat. Pura Appl. }, year = { 2007 }, volume = { 186 }, number = { 4 }, pages = { 721-744 }, }