@ARTICLE{vldb18,
  AUTHOR =       {Sabrina {De Capitani di Vimercati} and Sara Foresti and  Sushil Jajodia and  Giovanni Livraga and  Stefano Paraboschi and Pierangela Samarati},
  TITLE =        {An authorization model for multi-provider queries},
  JOURNAL =      {Proc. of the VLDB Endownment},
  YEAR =         {2017},
  volume =       {11},
  number =       {3},
  pages =        {256--268},
  doi =          {10.14778/3157794.3157796}
}