@Article{ 
  Con16,
  author = { Conti, Diego },
  title = { Intrinsic torsion in quaternionic contact geometry },
  journal = { Ann. Sc. Norm. Super. Pisa Cl. Sci. (5) },
  year = { 2016 },
  doi = { 10.2422/2036-2145.201407_004 },
  volume = { XVI },
  number = { 2 },
  pages = { 625-674 },
  URL = { https://gecogedi.dimai.unifi.it/paper/22/ },
  note = { cvgmt preprint}
}