@Article{ mor01a, author = { Mora, Maria Giovanna }, title = { The calibration method for free-discontinuity problems on vector-valued maps }, journal = { J. Convex Anal. }, year = { 2002 }, volume = { 9 }, number = { 1 }, pages = { 1-29 }, URL = { http://cvgmt.sns.it/paper/250/ }, note = { cvgmt preprint} }