1. R.J.R. Back, On the Correctness of Refinement in Program Development, Ph.D. thesis, Report A-1978-4, Department of Computer Science, University of Helsinki, 1978.
2. R.J.R. Back, Correctness Preserving Program Refinements: Proof Theory and Applications, Mathematical Center Tracts 131, Mathematical Centre, Amsterdam 1980.
3. R.J.R. Back, A Calculus of Refinements for Program Derivations, Acta Informatica, Vol 25, 1988, pp. 593–624, Springer-Verlag.
4. R.J.R. Back, Refining Atomicity in Parallel Algorithms, Åbo Akademi, Reports on computer science and mathematics, Ser. A, No 57,1988. To appear in PARLE Conference on Parallel Architectures and Languages Europe, Eindhoven, the Netherlands, June 12–16, 1989.
5. R.J.R. Back, E. Hartikainen and R. Kurki-Suonio, Multi-process handshaking on broadcasting networks, Åbo Akademi, Reports on computer science and mathematics, Ser. A, No 42,1985.