@article{grissa2017hammer,
  title={When the Hammer Meets the Nail: Multi-Server PIR for Database-Driven CRN with Location Privacy Assurance},
  author={Grissa, Mohamed and Yavuz, Attila A and Hamdaoui, Bechir},
  journal={arXiv preprint arXiv:1705.01085},
  year={2017}
}