@Article{ belnovpao01, author = { Bellettini, Giovanni and Novaga, Matteo and Paolini, Maurizio }, title = { On a crystalline variational problem, part I: first variation and global $L^\infty$ regularity }, journal = { Arch. Rational Mech. Anal. }, year = { 2001 }, volume = { 157 }, number = { 3 }, pages = { 165-191 }, URL = { http://cvgmt.sns.it/paper/1135/ }, note = { cvgmt preprint} }