A	B
1
2		Using Time Instead of Timeout for Fault-Tolerant Distributed Systems. Leslie Lamport. ACM Transact Program Lang Syst 1984
3		On optimistic methods for concurrency control. Kung & Robinson. ACM Transact Database Syst 1981
4		The Loopix Anonymity System. Piotrowska, Hayes, Elahi, Meiser, Danezis. arXiv