@Article{ MarMasTio17, author = { Marchese, Andrea and Massaccesi, Annalisa and Tione, Riccardo }, title = { A multi-material transport problem and its convex relaxation via rectifiable G-currents }, journal = { SIAM J. Math. Anal. }, year = { 2019 }, volume = { 51 }, number = { 3 }, pages = { 1965-1998 }, URL = { http://cvgmt.sns.it/paper/3702/ }, note = { cvgmt preprint} }