Banerjee, Utsav, et al. “Sapphire: A Configurable Crypto-Processor for Post-Quantum Lattice-Based Protocols”. IACR Transactions on Cryptographic Hardware and Embedded Systems, vol. 2019, no. 4, Aug. 2019, pp. 17-61, doi:10.13154/tches.v2019.i4.17-61.