@Article{ FrHoMoPa16, author = { Freddi, Lorenzo and Hornung, Peter and Mora, Maria Giovanna and Paroni, Roberto }, title = { A variational model for anisotropic and naturally twisted ribbons }, journal = { SIAM J. MATH. ANAL. }, year = { 2016 }, doi = { 10.1137/16M1074862 }, volume = { 48 }, number = { 6 }, pages = { 3883–3906 }, URL = { http://cvgmt.sns.it/paper/3038/ }, note = { cvgmt preprint} }