@Article{ AmbPinSpe14a, author = { Ambrosio, Luigi and Pinamonti, Andrea and Speight, Gareth }, title = { Tensorization of Cheeger energies, the space $H^{1,1}$ and the area formula for graphs }, journal = { Advances in Mathematics }, year = { 2014 }, volume = { 281 }, number = { 1145-1177 }, pages = { }, URL = { http://cvgmt.sns.it/paper/2480/ }, note = { cvgmt preprint} }