S2CID 102352657. ↑ Li, Wenting; Andreina, Sébastien; Bohli, Jens-Matthias; Karame, Ghassan (2017). "Securing Proof-of-Stake Blockchain Protocols". In Garcia-Alfaro, Joaquin; Navarro-Arribas, Guillermo; Hartenstein, Hannes; Herrera-Joancomartí, Jordi (eds.).