@Article{ 
  giamuc03,
  author = { Giaquinta, Mariano and Mucci, Domenico },
  title = { The Dirichlet energy of mappings from {\mbox{$*B^3*$}} into a manifold: density results and gap phenomenon },
  journal = { Calc. Var. },
  year = { 2004 },
  volume = { 20 },
  pages = { 367-397 },
  URL = { http://cvgmt.sns.it/paper/26/ },
  note = { cvgmt preprint}
}