@Article{ 
  CapDeNYud13a,
  author = { Cappelletti-Montano, Beniamino and De Nicola, Antonio and Yudin, Ivan },
  title = { Curvature properties of 3-quasi-Sasakian manifolds },
  journal = { Int. J. Geom. Methods Mod. Phys. },
  year = { 2013 },
  doi = { 10.1142/S0219887813600086 },
  volume = { 10 },
  pages = { 1360008 },
  URL = { https://gecogedi.dimai.unifi.it/paper/199/ },
  note = { cvgmt preprint}
}