1. Dpos description on bitshares.
http://docs.bitshares.org/bitshares/dpos.html
2. Lecture Notes in Computer Science;J-P Aumasson,2010
3. Lecture Notes in Computer Science;J Balasch,2013
4. Bertoni, G., Daemen, J., Peeters, M., Van Assche, G.: Keccak specifications. Submission to NIST (Round 2), pp. 320–337 (2009)
5. Bertoni, G., Daemen, J., Peeters, M., Van Assche, G.: Keccak sponge function family main document. Submission to NIST (Round 2), vol. 3, no. 30 (2009)