@Article{ lus07a, author = { Lussardi, Luca }, title = { An approximation result for free discontinuity functionals by means of non-local energies }, journal = { Math. Meth. Appl. Sci. }, year = { 2008 }, volume = { 31 }, number = { 18 }, pages = { 2133-2146 }, URL = { http://cvgmt.sns.it/paper/1325/ }, note = { cvgmt preprint} }