@Misc{ BePaPaSc17, author = { Bellettini, Giovanni and Paolini, Maurizio and Pasquarelli, Franco and Scianna, Giuseppe }, title = { Covers, soap films and BV functions }, journal = { }, year = { 2017 }, pages = { }, URL = { http://cvgmt.sns.it/paper/3596/ }, note = { cvgmt preprint} }