1. Exercises in quantifier manipulation;Backhouse,2006
2. Components as coalgebras;Barbosa,2001
3. Towards a calculus of state-based software components;Barbosa;J. Univers. Comput. Sci.,2003
4. Transposing partial components — an exercise on coalgebraic refinement;Barbosa;Theor. Comput. Sci.,2006
5. Distributive laws;Beck,1969