1. A nonpermutational integral relation algebra.
2. , and , Expressibility of Properties of Relations. Math. Institute, Hungarian Academy of Science, 1994.
3. and , Representations for Small Relation Algebras. Preprint, Department of Mathematics, Iowa State University, 1988.
4. and , On Jönsson's clones of operations on binary relations. In: Algebraic Logic (, and , eds.), North Holland Publ. Comp., Amsterdam 1991, pp. 431–442.
5. and , Permutation Groups and Combinatorial Structures. London Mathematical Society Lecture Notes Series 33, Cambridge University Press, Cambridge New York 1979.