1. Russel, S., Norvig, P.: Artificial Intelligence, a modern approach. Prentice-Hall, Englewood Cliffs (1995)
2. Knuth, D.: Semantics of context free languages. Math. Syst. Theory 2(2), 127–145 (1971)
3. Deransart, P., Maluszynski, J.: A grammatical view of logic programming. MIT Press, Cambridge (1993)
4. Papakonstantinou, G., Kontos, J.: Knowledge Representation with Attribute Grammars. The Computer Journal 29(3) (1986)
5. Papakonstantinou, G., Moraitis, C., Panayiotopoulos, T.: An attribute grammar interpreter as a knowledge engineering tool. Applied Informatics 9/86, 382–388 (1986)