Proposal for a fully decentralized blockchain and proof-of-work algorithm for solving NP-complete problems. - Carlos G. Oliver; Alessandro Ricottone; Pericles Philippopoulos (CoRR, 2017)

Difficulty Scaling in Proof of Work for Decentralized Problem Solving. - Pericles Philippopoulos; Alessandro Ricottone; Carlos G. Oliver (Ledger, 2020)