@Article{ GiaMazMol12, author = { Giacomelli, Lorenzo and Mazón, José M. and Moll, Salvador }, title = { The 1-harmonic flow with values into $\mathbb S^{1}$ }, journal = { SIAM Journal Math. Anal. }, year = { 2013 }, volume = { 45 }, pages = { 1723-1740 }, URL = { http://cvgmt.sns.it/paper/1873/ }, note = { cvgmt preprint} }