@Misc{ giamuc06a, author = { Giaquinta, Mariano and Mucci, Domenico }, title = { Maps into manifolds and currents: area and $W^{1,2}$-, $W^{1/2}$-, $BV$-energies }, journal = { }, year = { 2006 }, pages = { }, URL = { http://cvgmt.sns.it/paper/1429/ }, note = { cvgmt preprint} }