1. NATO ASI Series F;R.S. Bird,1987
2. Bird, R.S.: Introduction to Functional Programming using Haskell. Prentice-Hall (1998)
3. Bird, R.S., de Moor, O.: Algebra of Programming. International Series in Computer Science. Prentice-Hall (1997)
4. Cole, M.: Parallel programming, list homomorphisms and the maximum segment sum problems. Tech. Rep. CSR-25-93, Department of Computer Science, University of Edinburgh (1993)
5. Dijkstra, E.W.: The next fifty years. Tech. Rep. EWD1243, Eindhoven University of Technology (2004)