1. The ISIS Project,
http://www.cs.cornell.edu/Info/Projects/Isis/
2. The Horus Project,
http://www.cs.cornell.edu/Info/Projects/HORUS/
3. Cristian, F., et al.: Fault-Tolerance in the Advanced Automation System. In: 20th International Conference on Fault-Tolerant Computing, Newcastle upon Tyne, England (1990)
4. Mishra, S.: Consul: A Communication Substrate for Fault-Tolerant Distributed Programs. Ph.D thesis, Dept. of Computer Science, Univ. of Arizona, Tuscon, Arizona (1992)
5. Schneider, F.: Implementing Fault-Tolerant Services Using the State Machine Approach: A Tutorial. ACM Computing Surveys 22(4), 299–319 (1990)