@Article{ 
  ConMad15,
  author = { Conti, Diego and Madsen, Thomas Bruun },
  title = { Harmonic structures and intrinsic torsion },
  journal = { Transform. Groups },
  year = { 2015 },
  doi = { 10.1007/s00031-015-9325-x },
  volume = { 20 },
  number = { 3 },
  pages = { 699–723 },
  URL = { https://gecogedi.dimai.unifi.it/paper/23/ },
  note = { cvgmt preprint}
}