@Article{ alicorleo04, author = { Alicandro, Roberto and Corbo Esposito, Antonio and Leone, Chiara }, title = { Relaxation in BV of integral functionals defined on Sobolev functions with values in the unit sphere }, journal = { J. Convex Anal. }, year = { 2007 }, volume = { 14 }, number = { 1 }, pages = { 69-98 }, URL = { http://cvgmt.sns.it/paper/1314/ }, note = { cvgmt preprint} }