Software Fault Tolerance: An Evaluation. - Tom Anderson; Peter A. Barrett; Dave N. Halliwell; Michael R. Moulding (IEEE Trans. Software Eng., 1985)

Using passive replicates in Delta-4 to provide dependable distributed computing. - Neil A. Speirs; Peter A. Barrett (FTCS, 1989)

The Delta-4 extra performance architecture (XPA). - Peter A. Barrett; Andrew M. Hilborne; Peter G. Bond; Douglas T. Seaton; Paulo Veríssimo; Luís E. T. Rodrigues; Neil A. Speirs (FTCS, 1990)

Towards an integrated approach to fault tolerance in Delta-4. - Peter A. Barrett; Neil A. Speirs (Distributed Syst. Eng., 1993)