@inproceedings{pkc-2010-23417,
  title={Multi-query Computationally-Private Information Retrieval with Constant Communication Rate},
  booktitle={Public Key Cryptography - PKC 2010, 13th International Conference on Practice and Theory in Public Key Cryptography, Paris, France, May 26-28, 2010. Proceedings},
  series={Lecture Notes in Computer Science},
  publisher={Springer},
  volume={6056},
  pages={107-123},
  url={https://www.iacr.org/archive/pkc2010/60560107/60560107.pdf},
  doi={10.1007/978-3-642-13013-7_7},
  author={Jens Groth and Aggelos Kiayias and Helger Lipmaa},
  year=2010
}