Eyal, Ittay, and Emin Gün Sirer. "Majority is not enough: Bitcoin mining is vulnerable." Communications of the ACM 61.7 (2018): 95-102. https://www.cs.cornell.

Eyal, Ittay, and Emin Gün Sirer. "Majority is not enough: Bitcoin mining is vulnerable." Communications of the ACM 61.7 (2018): 95-102. https://www.cs.cornell.edu/~ie53/publications/btcProcFC.pdf https://www.cs.cornell.edu/~ie53/publications/btcProcFC.pdf