1. Lecture Notes in Computer Science;R. Alur,2006
2. Lecture Notes in Computer Science;R. Alur,2006
3. Barendregt, H.: Lambda calculi with types. In: Abramsky, S., Gabbay, D., Maibaum, T. (eds.) Handbook of Logic in Computer Science, vol. 2, pp. 118–309. Oxford University Press, Oxford (1992)
4. Comon, H., Dauchet, M., Gilleron, R., Jacquemard, F., Lugiez, D., Tison, S., Tommasi, M.: Tree Automata Techniques and Applications. Draft Book (2002),
http://l3ux02.univ-lille3.fr/tata/
5. Lecture Notes in Computer Science;H. Comon,1998