@Article{ 
  harmen10,
  author = { Harms, Philipp and Mennucci, Andrea C. G. },
  title = { Geodesics in infinite dimensional Stiefel and Grassmann manifolds },
  journal = { Comptes rendus - Mathématique },
  year = { 2012 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/336/ },
  note = { cvgmt preprint}
}