@Article{ vit, author = { Vittone, Davide }, title = { Lipschitz surfaces, perimeter and trace theorems for BV functions in Carnot-Carathèodory spaces }, journal = { Ann. Scuola Norm. Sup. Pisa Cl. Sci. }, year = { 2012 }, doi = { 10.2422/2036-2145.201010_007 }, volume = { XI }, number = { 4 }, pages = { 939--998 }, URL = { http://cvgmt.sns.it/paper/330/ }, note = { cvgmt preprint} }