1. Cohen, W.: Learning to classify English text with ILP methods. In L. de Raedt (Eds.), Advances in Inductive Logic programming. IOS Press (1996) 124–143
2. Muggleton, S., Feng, C.: Efficient induction of logic programs. In First Conference on Algorithmic Learning Theory. Omsha, Tokyo (1990)
3. Muggleton, S.: Inverse Entailment and Progol. New Generation Computing 13 (1995) 245–286.
4. Page, C. D., Frisch, A. M.: Generalization and Learnability: A study of constrained atoms. In S. Muggleton (Eds.): Inductive Logic Programming. Academic Press (1992) 29–61
5. Plotkin, G. D.: A further note on inductive generalization. In B. Meltzer and D. Michie (Eds.): Machine Intelligence 6. Elsevier, New York (1971)