@Article{ lusvit, author = { Lussardi, Luca and Vitali, Enrico }, title = { Non-local approximation of free-discontinuity problems with linear growth }, journal = { ESAIM Control Optim. Calc. Var. }, year = { 2007 }, volume = { 13 }, number = { 1 }, pages = { 135 }, URL = { http://cvgmt.sns.it/paper/615/ }, note = { cvgmt preprint} }