@Article{ 
  ConMad15a,
  author = { Conti, Diego and Madsen, Thomas Bruun },
  title = { Invariant torsion and G_2-metrics },
  journal = { Complex Manifolds },
  year = { 2015 },
  doi = { 10.1515/coma-2015-0011 },
  volume = { 2 },
  pages = { 140–167 },
  URL = { https://gecogedi.dimai.unifi.it/paper/24/ },
  note = { cvgmt preprint}
}